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A188421 Number of (6*n)Xn binary arrays with rows in nonincreasing order, 6 ones in every column and no more than 3 ones in any row.

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%I A188421 #6 Jul 22 2025 11:12:29
%S A188421 1,7,256,36659,15083334,14100262412,25784105550034
%N A188421 Number of (6*n)Xn binary arrays with rows in nonincreasing order, 6 ones in every column and no more than 3 ones in any row.
%C A188421 Row 6 of A188416
%e A188421 All solutions for 12X2
%e A188421 ..1..1....1..1....1..1....1..1....1..0....1..1....1..1
%e A188421 ..1..1....1..1....1..1....1..0....1..0....1..1....1..1
%e A188421 ..1..1....1..1....1..0....1..0....1..0....1..1....1..1
%e A188421 ..1..1....1..1....1..0....1..0....1..0....1..1....1..0
%e A188421 ..1..1....1..1....1..0....1..0....1..0....1..0....1..0
%e A188421 ..1..1....1..0....1..0....1..0....1..0....1..0....1..0
%e A188421 ..0..0....0..1....0..1....0..1....0..1....0..1....0..1
%e A188421 ..0..0....0..0....0..1....0..1....0..1....0..1....0..1
%e A188421 ..0..0....0..0....0..1....0..1....0..1....0..0....0..1
%e A188421 ..0..0....0..0....0..1....0..1....0..1....0..0....0..0
%e A188421 ..0..0....0..0....0..0....0..1....0..1....0..0....0..0
%e A188421 ..0..0....0..0....0..0....0..0....0..1....0..0....0..0
%K A188421 nonn
%O A188421 1,2
%A A188421 _R. H. Hardin_ Mar 30 2011

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