%I #8 Apr 27 2012 17:39:15

%S 1,5526,8882874018,4153630571837864748,564981170863476314096512687566,

%T 22354853275061169487985050625489956484533056,

%U 257300965334378745090532920060644632998190650709754736514068,861475141050998806961235302195978945049151803599433480523424276423626596675468

%N 1/19 the number of colorings of an n X n square array with 19 colors.

%Y Cf. A068239-A068305, A000332, A002417, A027441, A182368, A182406.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 24 2002

%E a(5)-a(8) from _Alois P. Heinz_, Apr 27 2012