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 A172534 #6 Apr 11 2017 16:15:13 %S A172534 0,0,0,0,0,0,0,0,0,0,0,1,6227020800,676508133623135814000, %T A172534 65662040698002721810659005184000, %U A172534 6892692735539278753058456514221737762215000 %N A172534 Number of n X n 0..1 arrays with row sums 12 and column sums 12. %H A172534 R. H. Hardin, <a href="/A172534/b172534.txt">Table of n, a(n) for n=1..18</a> %Y A172534 Column k=12 of A008300. %K A172534 nonn %O A172534 1,13 %A A172534 _R. H. Hardin_, Feb 06 2010