cp's OEIS Frontend

A188390 Number of (6*n) X 6 binary arrays with rows in nonincreasing order and n ones in every column.

%I A188390 #8 May 18 2020 10:48:26
%S A188390 203,29388,2406208,127126912,4762077620,135029200594,3037611501499,
%T A188390 56145844958803,875963221085790,11783651978066917,139046229227207511,
%U A188390 1459663879628065055,13793467053380688310,118506173536216683338
%N A188390 Number of (6*n) X 6 binary arrays with rows in nonincreasing order and n ones in every column.
%e A188390 Some solutions for 12 X 6:
%e A188390 ..1..1..0..0..0..1....1..1..0..1..1..0....1..1..0..0..1..0....1..1..0..0..0..1
%e A188390 ..1..0..1..0..1..0....1..0..0..0..0..0....1..0..0..0..0..0....1..0..1..1..1..0
%e A188390 ..0..1..0..1..1..0....0..1..1..0..0..1....0..1..1..0..0..0....0..1..0..0..0..0
%e A188390 ..0..0..1..0..0..1....0..0..1..0..0..1....0..0..1..0..1..0....0..0..1..0..0..0
%e A188390 ..0..0..0..1..0..0....0..0..0..1..1..0....0..0..0..1..0..1....0..0..0..1..0..0
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..1..0..1....0..0..0..0..1..1
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
%e A188390 ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
%Y A188390 Column 6 of A188392.
%K A188390 nonn
%O A188390 1,1
%A A188390 _R. H. Hardin_, Mar 30 2011
%E A188390 a(10)-a(14) from _Andrew Howroyd_, May 18 2020