%I
%S 0,1,5,27,195,1833,21125,286451,4453859,78031153,1520668645,
%T 32631020011,764640901539,19431070911513,532315915981605,
%U 15640217893829891,490640673319698179,16368499360721508833,578693283962999831365
%N Row sums of triangle A105629, which is the matrix logarithm of triangle A105623.
%C A105623 equals the matrix squareroot of triangle A105615.
%o (PARI) {a(n)=local(L,M=matrix(n+1,n+1,m,j,if(m>=j,if(m==j,1,if(m==j+1,2*j, polcoeff(1/sum(i=0,mj,(2*i)!/i!/2^i*x^i)+O(x^m),mj)))))^1); L=sum(i=1,#M,(1)^(i1)*(MM^0)^i/i); return(if(n<0,0,sum(k=0,n,L[n+1,k+1])/2))}
%Y Cf. A105629, A105623, A105615.
%K nonn
%O 0,3
%A _Paul D. Hanna_, Apr 16 2005
