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 A333736 #4 Apr 04 2020 19:19:47 %S A333736 1,1,3,13,106,1856,65481,3925518,363749095,48962187281,9168714763163, %T A333736 2310658842185472,762989388539984938,322853634364149927118, %U A333736 171803197981333555941746,113132136587981136905043170,90904234140548490596254230897 %N A333736 Number of non-isomorphic n X n nonnegative integer matrices with all row and column sums equal to 5 up to permutations of rows and columns. %Y A333736 Column k=5 of A333733. %K A333736 nonn %O A333736 0,3 %A A333736 _Andrew Howroyd_, Apr 04 2020