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 A333735 #4 Apr 04 2020 19:19:12 %S A333735 1,1,7,31,264,1856,12703,71457,348622,1477513,5584477,19071063, %T A333735 59748789,173510124,471615249,1208756261,2940705168,6827326093, %U A333735 15197942364,32566376769,67408927586,135184087822,263356043520,499542801451,924501767285,1672391804486 %N A333735 Number of non-isomorphic 5 X 5 nonnegative integer matrices with all row and column sums equal to n up to permutations of rows and columns. %Y A333735 Row n=5 of A333733. %K A333735 nonn %O A333735 0,3 %A A333735 _Andrew Howroyd_, Apr 04 2020