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1/9 the number of colorings of an n X n square array with 9 colors.
1

%I #8 Apr 27 2012 17:28:17

%S 1,456,10556008,12405232610688,740083033797732630216,

%T 2241435875640746831506090496496,

%U 344621623364019594715666338046505649098368,2689856201334666341950387692094152693428585565204907488,1065825084866806867830786487316472449826266534389338451645760215077416

%N 1/9 the number of colorings of an n X n square array with 9 colors.

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 24 2002

%E a(6)-a(9) from _Alois P. Heinz_, Apr 27 2012