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 A134135 #7 Jun 28 2017 20:39:44 %S A134135 1,1,5,15,93,551,4129,33607,312929,3179343,35602881,432201743, %T A134135 5678740945,80142780751,1210609725905,19481112885231,332836223507793, %U A134135 6016678424942063,114746996449871761,2302527084416470255 %N A134135 Alternating row sums of triangle A134134. %C A134135 Difference of numbers sum(product(j!^e(n,m,k,j),j=1..n),k=1..p(n,m)) related to odd and even part m partitions of n. Here e(n,m,k,j) is the exponent of j in the k-th m part partition of n and p(n,m)=A008284(n,m) is the number of partitions of n with m parts. %F A134135 a(n)=sum(A134134(n,m)*(-1)^(m-1),m=1..n),n>=1. %Y A134135 Cf. A077365 (row sums of A134134). %K A134135 nonn,easy %O A134135 1,3 %A A134135 _Wolfdieter Lang_ Oct 12 2007