OFFSET
0,2
PROG
(PARI) {a(n)=if(n<0, 0, (matrix(n+2, n+2, m, j, if(m==j, 1, if(m==j+1, -m+1, -(m-j-1)*polcoeff(log(sum(i=0, m, (i+2)!/2!*x^i)), m-j-1))))^-1)[n+2, 2])}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Aug 07 2005
STATUS
approved