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Row sums of triangle A106208.
1

%I #4 Mar 30 2012 18:36:45

%S 1,2,6,30,231,2453,33393,556999,11039026,254128870,6677972615,

%T 197547561340,6504619941881,236165840696980,9380353293627619,

%U 404848232250564042,18875601922237847288,945875935431064488637

%N Row sums of triangle A106208.

%o (PARI) {a(n)=local(A=matrix(1,1),B);A[1,1]=1; for(m=2,n+1,B=matrix(m,m);for(i=1,m, for(j=1,i, if(j==i,B[i,j]=j,if(j==1,B[i,j]=(A^2)[i-1,1], B[i,j]=(A^2)[i-1,j]));));A=B); return(sum(k=0,n,A[n+1,k+1]/(k+1)))}

%Y Cf. A106208.

%K nonn

%O 0,2

%A _Paul D. Hanna_, May 01 2005