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 A058392 #12 Sep 07 2018 11:56:40 %S A058392 1,11,782,96073,9283247,537001197,19578605324,487615778173, %T A058392 8892272235593,125319645293555,1423054983691408,13451239365449764, %U A058392 108603794657349271,764673059329865921,4775254548845993462,26820549989969591853,137072193873357150230,643738505766475169048 %N A058392 Number of 6 X 6 matrices with nonnegative integer entries and all row sums equal to n, up to row and column permutation. %H A058392 Andrew Howroyd, <a href="/A058392/b058392.txt">Table of n, a(n) for n = 0..1000</a> %H A058392 V. Jovovic, <a href="/A058389/a058389a.pdf">Number of m x m nonnegative integer matrices with all row sums equal to n, up to row and column permutation.</a> %o A058392 (PARI) \\ See A318951 for RowSumMats %o A058392 a(n)=RowSumMats(6, 6, n); \\ _Andrew Howroyd_, Sep 05 2018 %Y A058392 Row 6 of A318951. %Y A058392 Cf. A002620, A058389-A058391, A003439, A005467. %K A058392 nonn %O A058392 0,2 %A A058392 _Vladeta Jovovic_, Nov 24 2000 %E A058392 Terms a(15) and beyond from _Andrew Howroyd_, Sep 05 2018