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A202711 Number of n X n 0..1 arrays with row sums equal and no column sum equal to the previous.

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%I A202711 #8 Jul 22 2025 16:46:39
%S A202711 2,2,38,838,75302,27842760,37121438930,192513188823366
%N A202711 Number of n X n 0..1 arrays with row sums equal and no column sum equal to the previous.
%C A202711 Column 1 of A202714
%e A202711 Some solutions for n=5
%e A202711 ..0..1..0..1..1....1..1..0..1..0....1..0..1..0..0....1..0..1..0..0
%e A202711 ..1..1..0..1..0....1..1..0..1..0....0..1..0..1..0....0..1..0..0..1
%e A202711 ..0..0..1..1..1....1..1..0..0..1....1..0..1..0..0....0..1..0..0..1
%e A202711 ..1..0..1..0..1....0..1..1..0..1....0..1..1..0..0....0..1..1..0..0
%e A202711 ..1..0..1..1..0....1..1..0..0..1....1..0..0..1..0....0..0..0..1..1
%K A202711 nonn
%O A202711 1,1
%A A202711 _R. H. Hardin_ Dec 23 2011

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