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 A255959 #4 Mar 11 2015 19:16:19 %S A255959 0,42,3836,174652,5579536,144467430,3265329848,67312339598, %T A255959 1301421849824,24048952078889,430422420403100,7533527344234870, %U A255959 129872860822059096,2217253446393756056,37645087319936852196,637701933335948288525,10805989785555925331616 %N A255959 Number of collections of nonempty multisets with a total of n+9 objects of exactly n colors. %H A255959 Alois P. Heinz, <a href="/A255959/b255959.txt">Table of n, a(n) for n = 0..250</a> %F A255959 a(n) = A255903(n+9,n). %Y A255959 A diagonal of A255903. %K A255959 nonn %O A255959 0,2 %A A255959 _Alois P. Heinz_, Mar 11 2015