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 A187008 #4 Mar 30 2012 18:37:26
%S A187008 1,2,5,18,96,733,7501,97054,1521112,28005248,592218737,14141289480,
%T A187008 376251253450,11036022346816,353747961265089,12301349824260074,
%U A187008 461216257715290976,18545829116907146812,796122011317944176206
%N A187008 Row sums of triangle A187005.
%C A187008 Definition of triangle: A187005(n,k) = [y^k] R_{n-1}(y+y^2) for k=1..n where R_n(y) is the n-th row polynomial for n>1 with R_1(y)=y.
%o A187008 (PARI) {a(n)=local(Rn=y);for(m=1,n,Rn=subst(truncate(Rn),y,y+y^2+y*O(y^m)));subst(truncate(Rn),y,1)}
%Y A187008 Cf. A187005, A135081, A187006, A187007, A187009.
%K A187008 nonn
%O A187008 1,2
%A A187008 _Paul D. Hanna_, Mar 02 2011