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A203490 Number of nX7 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

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%I A203490 #6 Jul 22 2025 17:17:12
%S A203490 192,134412,59683122,24148894412,9532999874792
%N A203490 Number of nX7 0..2 arrays with row sums equal and column sums unequal to adjacent columns.
%C A203490 Column 7 of A203491
%e A203490 Some solutions for n=4
%e A203490 ..0..1..0..0..2..1..0....0..2..1..2..0..0..0....0..1..1..1..2..2..0
%e A203490 ..0..2..0..2..0..0..0....2..2..0..0..0..1..0....0..0..2..0..1..2..2
%e A203490 ..2..2..0..0..0..0..0....1..1..2..1..0..0..0....1..2..2..2..0..0..0
%e A203490 ..2..0..1..0..1..0..0....0..0..0..2..0..2..1....0..2..1..1..0..1..2
%K A203490 nonn
%O A203490 1,1
%A A203490 _R. H. Hardin_ Jan 02 2012

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