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 A052372 #9 Sep 03 2018 23:07:01 %S A052372 1,1,4,10,33,91,298,881,2825,8791,27947,87410,272991,837370,2532012, %T A052372 7496030,21735743,61570427,170399621,460413115,1214983434,3131870712, %U A052372 7890604652,19441462894,46878788710,110702854983,256217556777 %N A052372 Number of nonnegative integer 6 X 6 matrices with sum of elements equal to n, under row and column permutations. %H A052372 Andrew Howroyd, <a href="/A052372/b052372.txt">Table of n, a(n) for n = 0..1000</a> %Y A052372 Row 6 of A318795. %Y A052372 Cf. A002724, A053307. %K A052372 nonn %O A052372 0,3 %A A052372 _Vladeta Jovovic_, Mar 08 2000