%I #8 May 18 2020 03:00:51
%S 877,624889,238773109,55643064708,8738543204786,992649275638900,
%T 85864898797026630,5878897478976883089,328290088245117576091,
%U 15312799057782368782624,608266461487720680703265,20908600183730320082374280
%N Number of (7*n) X 7 binary arrays with rows in nonincreasing order and n ones in every column.
%e Some solutions for 14 X 7:
%e ..1..0..0..0..0..0..0....1..0..0..0..1..0..1....1..0..0..1..0..0..1
%e ..1..0..0..0..0..0..0....1..0..0..0..1..0..0....1..0..0..0..0..0..0
%e ..0..1..1..0..0..0..0....0..1..0..1..0..0..0....0..1..0..0..0..0..0
%e ..0..1..0..0..0..0..1....0..1..0..0..0..0..0....0..1..0..0..0..0..0
%e ..0..0..1..0..0..0..1....0..0..1..1..0..1..0....0..0..1..1..0..0..1
%e ..0..0..0..1..1..1..0....0..0..1..0..0..0..0....0..0..1..0..0..0..0
%e ..0..0..0..1..0..0..0....0..0..0..0..0..1..0....0..0..0..0..1..1..0
%e ..0..0..0..0..1..1..0....0..0..0..0..0..0..1....0..0..0..0..1..1..0
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%Y Column 7 of A188392.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 30 2011
%E a(7)-a(12) from _Andrew Howroyd_, May 17 2020
|