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 A172868 #8 Apr 18 2020 22:25:07 %S A172868 1,51,3391,261331,22069251,1985311701,187403959401,18343212299091, %T A172868 1846780916614531,190172119451839801,19947450199250403501, %U A172868 2124709987334672961301,229273855680211513815541 %N A172868 Number of n X 5 0..5 arrays with row sums 5 and column sums n. %H A172868 R. H. Hardin, <a href="/A172868/b172868.txt">Table of n, a(n) for n=1..95</a> %Y A172868 Column k=5 of A333901. %K A172868 nonn %O A172868 1,2 %A A172868 _R. H. Hardin_, Feb 06 2010