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 A255956 #4 Mar 11 2015 19:20:16 %S A255956 0,15,547,11567,194034,2867370,39371078,517625311,6638232088, %T A255956 84049392636,1059294338130,13365234309735,169503160980862, %U A255956 2167174153942889,27993233769578735,365877521257764650,4844399884368946336,65032238155662126051,885651362300592607773 %N A255956 Number of collections of nonempty multisets with a total of n+6 objects of exactly n colors. %H A255956 Alois P. Heinz, <a href="/A255956/b255956.txt">Table of n, a(n) for n = 0..250</a> %F A255956 a(n) = A255903(n+6,n). %Y A255956 A diagonal of A255903. %K A255956 nonn %O A255956 0,2 %A A255956 _Alois P. Heinz_, Mar 11 2015