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%I #4 Mar 30 2012 18:37:26
%S 1,2,5,18,96,733,7501,97054,1521112,28005248,592218737,14141289480,
%T 376251253450,11036022346816,353747961265089,12301349824260074,
%U 461216257715290976,18545829116907146812,796122011317944176206
%N Row sums of triangle A187005.
%C 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 (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 Cf. A187005, A135081, A187006, A187007, A187009.
%K nonn
%O 1,2
%A _Paul D. Hanna_, Mar 02 2011
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