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A188420 Number of (5*n)Xn binary arrays with rows in nonincreasing order, 5 ones in every column and no more than 3 ones in any row.

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%I A188420 #6 Jul 22 2025 11:12:21
%S A188420 1,6,150,11712,2181522,793369090,498407294632,497114063711190
%N A188420 Number of (5*n)Xn binary arrays with rows in nonincreasing order, 5 ones in every column and no more than 3 ones in any row.
%C A188420 Row 5 of A188416
%e A188420 All solutions for 10X2
%e A188420 ..1..1....1..1....1..0....1..1....1..1....1..1
%e A188420 ..1..1....1..1....1..0....1..0....1..1....1..1
%e A188420 ..1..1....1..0....1..0....1..0....1..1....1..1
%e A188420 ..1..0....1..0....1..0....1..0....1..1....1..1
%e A188420 ..1..0....1..0....1..0....1..0....1..1....1..0
%e A188420 ..0..1....0..1....0..1....0..1....0..0....0..1
%e A188420 ..0..1....0..1....0..1....0..1....0..0....0..0
%e A188420 ..0..0....0..1....0..1....0..1....0..0....0..0
%e A188420 ..0..0....0..0....0..1....0..1....0..0....0..0
%e A188420 ..0..0....0..0....0..1....0..0....0..0....0..0
%K A188420 nonn
%O A188420 1,2
%A A188420 _R. H. Hardin_ Mar 30 2011

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