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A203497 Number of 7Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

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%I A203497 #6 Jul 22 2025 17:18:04
%S A203497 3,2050,1107888,1004305424,1022868051652,1172134178554204
%N A203497 Number of 7Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.
%C A203497 Row 7 of A203491
%e A203497 Some solutions for n=4
%e A203497 ..2..2..0..1....2..0..1..1....1..2..0..1....2..0..1..0....0..1..0..0
%e A203497 ..2..1..0..2....2..1..1..0....2..0..2..0....0..0..2..1....0..0..0..1
%e A203497 ..1..1..1..2....1..2..0..1....1..1..2..0....1..2..0..0....0..0..1..0
%e A203497 ..1..1..1..2....1..2..0..1....1..0..1..2....2..0..0..1....1..0..0..0
%e A203497 ..2..1..1..1....2..2..0..0....1..2..1..0....2..0..0..1....0..0..0..1
%e A203497 ..1..0..2..2....1..0..1..2....0..0..2..2....0..1..2..0....0..0..0..1
%e A203497 ..0..2..1..2....1..0..1..2....1..0..1..2....2..1..0..0....0..1..0..0
%K A203497 nonn
%O A203497 1,1
%A A203497 _R. H. Hardin_ Jan 02 2012

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