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A135752
E.g.f.: A(x) = 1 + Sum_{n>=1} (1/n!)*Product_{k=1..n} [exp(kx) - 1].
2
1, 1, 3, 16, 129, 1436, 20853, 379716, 8421969, 222507532, 6879755613, 245389976756, 9977456650329, 457823345757948, 23505009169553733, 1340233911805244836, 84321693844646338209, 5820386696023034821484
OFFSET
0,3
LINKS
PROG
(PARI) {a(n)=n!*polcoeff(1+sum(j=1, n, (1/j!)*prod(k=1, j, exp(k*x +x*O(x^n))-1)), n)}
CROSSREFS
Sequence in context: A340341 A362661 A368791 * A218827 A120021 A223897
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 27 2007
STATUS
approved