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A215923 Number of diagonal and antidiagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order.

%I A215923 #5 Jul 22 2025 23:27:48
%S A215923 5,203,12840,14050312,4044766240,18383354944364,12954733199158688,
%T A215923 152834703746357948488,204451724239460493425216,
%U A215923 4971673449387903153569761420,10980920102796579166081443367088
%N A215923 Number of diagonal and antidiagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order.
%C A215923 Column 7 of A215924
%e A215923 Some solutions for n=3
%e A215923 ..x..0..x..1..x..0..x....x..0..x..1..x..0..x....x..0..x..0..x..0..x
%e A215923 ..2..x..3..x..2..x..3....1..x..2..x..3..x..1....1..x..2..x..2..x..2
%e A215923 ..x..4..x..1..x..5..x....x..4..x..0..x..0..x....x..0..x..1..x..1..x
%K A215923 nonn
%O A215923 1,1
%A A215923 _R. H. Hardin_ Aug 27 2012