This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A188391 #8 May 18 2020 03:00:51 %S A188391 877,624889,238773109,55643064708,8738543204786,992649275638900, %T A188391 85864898797026630,5878897478976883089,328290088245117576091, %U A188391 15312799057782368782624,608266461487720680703265,20908600183730320082374280 %N A188391 Number of (7*n) X 7 binary arrays with rows in nonincreasing order and n ones in every column. %e A188391 Some solutions for 14 X 7: %e A188391 ..1..0..0..0..0..0..0....1..0..0..0..1..0..1....1..0..0..1..0..0..1 %e A188391 ..1..0..0..0..0..0..0....1..0..0..0..1..0..0....1..0..0..0..0..0..0 %e A188391 ..0..1..1..0..0..0..0....0..1..0..1..0..0..0....0..1..0..0..0..0..0 %e A188391 ..0..1..0..0..0..0..1....0..1..0..0..0..0..0....0..1..0..0..0..0..0 %e A188391 ..0..0..1..0..0..0..1....0..0..1..1..0..1..0....0..0..1..1..0..0..1 %e A188391 ..0..0..0..1..1..1..0....0..0..1..0..0..0..0....0..0..1..0..0..0..0 %e A188391 ..0..0..0..1..0..0..0....0..0..0..0..0..1..0....0..0..0..0..1..1..0 %e A188391 ..0..0..0..0..1..1..0....0..0..0..0..0..0..1....0..0..0..0..1..1..0 %e A188391 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A188391 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A188391 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A188391 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A188391 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A188391 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %Y A188391 Column 7 of A188392. %K A188391 nonn %O A188391 1,1 %A A188391 _R. H. Hardin_, Mar 30 2011 %E A188391 a(7)-a(12) from _Andrew Howroyd_, May 17 2020