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%I #6 Mar 30 2012 18:37:26
%S 1,3,12,67,512,5143,64988,995334,17948683,372703529,8759307844,
%T 229843336284,6660078541359,211201170221925,7274712426981184,
%U 270441300892307916,10791919593795653296,460087687818627367809
%N Rows sums of triangle A187115.
%C Definition of triangle: A187115(n,k) = [y^k] R_{n-1}(y+y^2) for k=2..n, n>2, where R_n(y) is the n-th row polynomial starting with R_2(y)=y^2.
%o (PARI) {a(n)=local(Rn=y^2);for(m=2,n,Rn=subst(truncate(Rn),y,y+y^2+O(y^m)));subst(truncate(Rn),y,1)}
%Y Cf. A187115, A135082, A187116, A187117, A187008.
%K nonn
%O 2,2
%A _Paul D. Hanna_, Mar 08 2011
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