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 A123310 #3 Mar 30 2012 18:36:59 %S A123310 1,2,5,18,93,650,5825,64486,858525,13460814,244360845,5063982498, %T A123310 118379934453,3090176655290,89294118056273,2834776197278278, %U A123310 98222473389128821,3693056479700344798,149906848766779722109 %N A123310 Row sums of triangle A123305. %C A123310 Triangle T=A123305 is defined by: (column k of T) = (k+1)*(column k of T^2) shifted to have an initial '1'. %Y A123310 Cf. A123305; A123306, A123307, A123308, A123309, A123311. %K A123310 nonn %O A123310 0,2 %A A123310 _Paul D. Hanna_, Sep 25 2006