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Column 0 of triangular matrix A246381 = exp(L) where L(n,k) = C(2*n, 2*k+1)/2.
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%I #3 Aug 24 2014 19:51:22

%S 1,1,3,12,73,584,5889,73184,1089057,19019632,384301729,8870379064,

%T 231356923985,6757908117208,219384432585553,7861969355896416,

%U 309183385066009665,13273824175564131424,619230263962630471745,31258573195774440816360,1701019508896703563600241,99446312062485160435840776

%N Column 0 of triangular matrix A246381 = exp(L) where L(n,k) = C(2*n, 2*k+1)/2.

%o (PARI) {a(n)=local(L=matrix(n+1,n+1,r,c,if(r>=c,binomial(2*r-2,2*c-1)/2)),A);

%o A=sum(m=0,n,L^m/m!);A[n+1,1]}

%o for(n=0,25,print1(a(n),", "))

%Y Cf. A246381, A246383, A246384, A246385.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Aug 24 2014