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 A172535 #6 Apr 11 2017 16:06:28 %S A172535 0,0,0,0,0,0,0,0,0,0,1,479001600,3574340599104475200, %T A172535 27537152449960680597739468800, %U A172535 254143667822686635850590661555095468000,3183529624645847695375078143769686741065620316160 %N A172535 Number of n X n 0..1 arrays with row sums 11 and column sums 11. %H A172535 R. H. Hardin, <a href="/A172535/b172535.txt">Table of n, a(n) for n=1..18</a> %Y A172535 Column k=11 of A008300. %K A172535 nonn %O A172535 1,12 %A A172535 _R. H. Hardin_, Feb 06 2010