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 A255957 #4 Mar 11 2015 19:18:49 %S A255957 0,22,1072,29601,619912,11114495,181183512,2780643510,41061951752, %T A255957 591934822191,8413431494820,118743727038442,1672710979428996, %U A255957 23607896213910671,334780182967095890,4780433697809258160,68848723689089441744,1001367352097382384733 %N A255957 Number of collections of nonempty multisets with a total of n+7 objects of exactly n colors. %H A255957 Alois P. Heinz, <a href="/A255957/b255957.txt">Table of n, a(n) for n = 0..250</a> %F A255957 a(n) = A255903(n+7,n) %Y A255957 A diagonal of A255903. %K A255957 nonn %O A255957 0,2 %A A255957 _Alois P. Heinz_, Mar 11 2015