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 A172947 #8 Apr 18 2020 22:26:34 %S A172947 1,1107,2186815,5796870115,18343212299091,65338547748658101, %T A172947 253310893747894263177,1046591482728407939338275, %U A172947 4543765474410728783088589075,20524231145279587298876714943337 %N A172947 Number of n X 8 0..8 arrays with row sums 8 and column sums n. %H A172947 R. H. Hardin, <a href="/A172947/b172947.txt">Table of n, a(n) for n=1..35</a> %Y A172947 Column k=8 of A333901. %K A172947 nonn %O A172947 1,2 %A A172947 _R. H. Hardin_, Feb 06 2010