OFFSET
1,2
COMMENTS
Limit a(n+1)/a(n) exists and is conjectured to equal exp(exp(-1)).
FORMULA
PROG
(PARI) {a(n)=floor(sum(k=0, n+10, sum(j=0, k, n^j*(matrix(k+1, k+1, r, c, if(r>=c, 1.*(r-1)^(c-1)))^-1)[k+1, j+1])))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, May 17 2005
STATUS
approved