There are 4 registered NAPs in Louisiana.

I'm pretty sure those NAPs are registrants of the National Atheist Party. The National Atheist Party formed in March 2011 and the first NAPs showed up on the Louisiana voter rolls in March 2012. Last month the National Atheist Party announced that, as of today, their name would change to the Secular Party of America.

There were some interesting changes to the Louisiana voter registration totals in July. The registrant totals for the Democratic Party, Republican Party, Green Party, and Reform Party all decreased. Of Louisiana's five recognized political parties, the Libertarian Party was the only one whose numbers increased in July. The number of Libertarian Party registrants increased by 59, but that was a significant reduction in the Libertarian rate of growth. The Libertarian numbers had been increasing by more than 100 each month for the last few months. Most surprisingly, the number of No Party registrants decreased in July. The registrant numbers as of July 1 can be found here.

According to the Louisiana Secretary of State's office, these are the numbers of registrants for all the parties on the Louisiana voter registration rolls as of August 1, 2013:

Democratic 1388516
Republican 806557
No Party 651226
INDEPENDENT 46315
Libertarian 8100
Green Party 1793
Reform Party 1398
OTHER 1221
AMERICANS ELECT 714
CONSERVATIVE 606
INDENPENDENT 385
LIBERAL 252
TEA PARTY 177
CHRISTIAN 170
AMERICAN 111
CONSTITUTION 110
PRUD ACT RSLTS 95
OPEN 85
MODERATE 79
SOCIALIST 70
LILBERTARIAN 56
INDEPENTANT 55
INEDEPENDENT 54
UNDECIDED 50
DANSEREAU 43
CONSTITUTIONAL 37
MAJOR 35
NON PARTISAN 29
RADICAL 27
REPUBLIC 27
CONFEDERATE 25
BANANA 23
UNAFFILIATED 22
COMMUNIST 21
NEUTRAL 20
TEA 20
PROGRESSIVE 19
UNDECLARED 19
FACIST 18
INDEPEMDENT 18
JEDI 18
ANARCHIST 16
LIB 16
LIBERTAIN 16
CENTRIST 15
INDEPENDENCE 15
WHIG 14
REFORMIST 13
3RD PARTY 12
EARTH FIRST 11
LIBRAL 9
NON-PARTISAN 9
PRIMARY 9
SEGREGATION 9
INDIVIDUAL 8
PRESIDENTIAL 8
U S TAXPAYERS 8
FEDERALIST 7
MODERN WHIG 7
PATRIOT 7
WARD 7
BULL MOOSE 6
CONSERVATIST 6
CONSTITUTIONALI 6
DEM SOCIALIST 6
INDEPENDENT LA 6
AEROSMITH 5
CATHOLIC REG 5
ChrstnSocialist 5
COMMON SENSE 5
NAT SOC 5
SOUTHERN 5
TAX PAYERS 5
THIRD PARTY 5
DEM.REP 4
FREE 4
GDI 4
LIBERALIST 4
NAP 4
POPULIST 4
Republitarian 4
SOCIALIST USA 4
STATES RIGHTS 4
WHITE 4
AMERICAN PARTY 3
BAPTIST 3
CIVIL LIBERTAR 3
CONS 3
DEMOC SOCIAL 3
DEPENDENT 3
DEPENDS 3
NATURAL LAW 3
NON PARTISIAN 3
PIRATE 3
PRIVATE 3
USA 3
AM INDEPENDENT 2
AMERICAN FIRST 2
AMERICAN INDEP 2
ANARCH 2
ANARCHY 2
BEST 2
BI PARTISAN 2
BI-PARTISAN 2
BIPARTISAN 2
CHRISTIAN PROGR 2
COMMITTEE 2
COMMUNITARIAN 2
CONFIDENTIAL 2
CONSTRUCTIONALI 2
ENVIORMENTAL 2
FREEDOM 2
GRILLED CHEESE 2
HAZAL 2
INDEPENDANCE 2
JEFFERSONIAN 2
JESUS 2
KINGDOM 2
LA TAXPAYERS 2
LABOR 2
MIXED 2
NATIONAL 2
NATIONAL SOCIA 2
NATIONALIST 2
NATURAL 2
NEW PARTY 2
NON-DENOMIN 2
NUNYA 2
PAR 2
PEACE 2
PEACE&FREEDOM 2
PEOPLES CHOICE 2
PERSONAL 2
POLITICAL 2
POSSIBILITARIAN 2
PRO LIFE 2
RASTAFARIAN 2
REALIST 2
TAXPAYERS 2
THEOCRATIC 2
WORKERS 2
AID 1
AMERICA 1
ANTI-PARTY 1
BILLY 1
BLACK 1
BLACK PANTHER 1
CAJUN 1
CENRIST 1
CHOICE 1
CHRIST CO 1
CHRONIC HIWAII 1
CITIZEN 1
CONSERVANCE 1
CONSERVATED 1
CU TAI WOU 1
DISCORDIAN 1
DIXIECRAT 1
DRUID 1
FAIR 1
FREE RADICAL 1
FREEDOM MOVEMT 1
FREEDOMIST 1
FREEMANS 1
GALACTIC EMPIRE 1
GOD 1
GOVERNMENT 1
GRASS ROOTS 1
GREEN PEACE 1
GYPSY 1
HONEST 1
HUMAN 1
HUMANITARIAN 1
IMPERIALIST 1
INDIVIDUALIST 1
INTERNETARIAN 1
JasonJohnLeMair 1
KINGDOM OF GOD 1
LEAGUE OF SOUT 1
LIB.REPUBLICAN 1
LIBERAL DEM 1
LIBERAL REP 1
LOYALIST 1
MEADOW 1
MILLENNIUM 1
MINIMALIST 1
Moderate Republ 1
MONARCHIST 1
MOOR 1
MOTHER 1
MUSLIM 1
NDEPENDENT 1
NONPARTISAN 1
P 1
PACIFIC ISLAN 1
PARTY OF ONE 1
PEACE & FREEDO 1
PEDESTRIAN 1
PENTECOSTAL 1
PROG DEM 1
PROHIBITION 1
PropRepresenPty 1
PRS 1
RAINBOW 1
REP-AMERICAN 1
RIGHT 1
RIGHT TO LIFE 1
RIGHTWING WHIG 1
Sensationalist 1
SOC-DEM 1
SOCIAL 1
SOUTHERN PARTY 1
SOUTHERN REF 1
SPLIT 1
SUB GENIUS 1
SURVIVALIST 1
THEOCRAT 1
UNION 1
UNITED NEUTRAL 1
UNITED REPUBLI 1
UNITED WE ST 1
VETERANS 1
WORKING CLASS 1
WORLD PARTY 1
Y 1