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A188452 Number of (4*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 4 ones in every column.

%I A188452 #6 Jul 22 2025 11:13:20
%S A188452 0,0,1,139,16683,2876300,703845255,235994839738,105035943170557
%N A188452 Number of (4*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 4 ones in every column.
%C A188452 Row 4 of A188449
%e A188452 All solutions for 12X3
%e A188452 ..1..1..1
%e A188452 ..1..1..0
%e A188452 ..1..0..1
%e A188452 ..1..0..0
%e A188452 ..0..1..1
%e A188452 ..0..1..0
%e A188452 ..0..0..1
%e A188452 ..0..0..0
%e A188452 ..0..0..0
%e A188452 ..0..0..0
%e A188452 ..0..0..0
%e A188452 ..0..0..0
%K A188452 nonn
%O A188452 1,4
%A A188452 _R. H. Hardin_ Mar 31 2011