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 A058410 #9 Aug 05 2022 22:27:43 %S A058410 1,5,45,407,3411,25142,163711,947909,4949257,23579022,103592423, %T A058410 423435205,1622413728,5864055622,20102107500,65660463140,205176581382, %U A058410 615506305973,1778086106680,4959845850882,13391444267162,35072585737475,89275252614236,221246652070184 %N A058410 Number of 4 X n nonnegative integer matrices with all column sums 4, up to row and column permutation. %H A058410 <a href="/A058407/a058407.pdf">Number of m x l nonnegative integer matrices with all column sums equal to n, up to row and column permutation</a> %F A058410 G.f.: 1 / 24*(1 / (1 - x)^35 + 6 / (1 - x)^9 / (1 - x^2)^13 + 3 / (1 - x)^3 / (1 - x^2)^16 + 8 / (1 - x)^2 / (1 - x^3)^11 + 6 / (1 - x) / (1 - x^2) / (1 - x^4)^8). %Y A058410 Cf. A050532, A058390, A058407-A058409. %K A058410 easy,nonn %O A058410 0,2 %A A058410 _Vladeta Jovovic_, Nov 25 2000 %E A058410 More terms from _Sean A. Irvine_, Aug 05 2022