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 A202559 #6 Jul 22 2025 16:39:24 %S A202559 8,293,9520,342295,12176148,436020774,15635171834,557315843073, %T A202559 19890838348436,707996212911950,25194289287709052 %N A202559 Number of nX7 0,1 arrays with the row and column sums nondecreasing. %C A202559 Column 7 of A202560 %e A202559 Some solutions for n=3 %e A202559 ..0..1..0..0..1..0..0....0..0..0..0..1..0..0....0..0..1..0..1..0..1 %e A202559 ..1..0..0..0..1..1..1....0..0..0..1..0..0..0....0..1..0..1..1..1..0 %e A202559 ..0..0..1..1..0..1..1....0..1..1..0..0..1..1....1..1..1..1..0..1..1 %K A202559 nonn %O A202559 1,1 %A A202559 _R. H. Hardin_ Dec 21 2011