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 A172539 #6 Apr 11 2017 16:04:41 %S A172539 0,0,0,0,0,0,0,0,0,1,39916800,21959547410077200, %T A172539 14255616537578735986867200,12163525741347497524178307740904300, %U A172539 14962628816774970940772777740084998521738256 %N A172539 Number of n X n 0..1 arrays with row sums 10 and column sums 10. %H A172539 R. H. Hardin, <a href="/A172539/b172539.txt">Table of n, a(n) for n=1..19</a> %Y A172539 Column k=10 of A008300. %K A172539 nonn %O A172539 1,11 %A A172539 _R. H. Hardin_, Feb 06 2010