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A141006 E.g.f. exp(sum_{d|M} (exp(d*x)-1)/d), M=9. 2
1, 3, 22, 235, 3139, 49376, 891491, 18160071, 411124024, 10212362573, 275543711899, 8012352809874, 249516568317597, 8277748828228015, 291219448755079278, 10821916875914147551, 423314732431005599479 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

MATHEMATICA

u[0, j_]: = 1; u[k_, j_]: = u[k, j] = Sum[Binomial[k-1, i-1]Plus@@(u[k-i, j]#^(i-1)&/@Divisors[j]), {i, k}]; Table[u[n, 9], {n, 0, 30}](* Vincenzo Librandi, Dec 12 2012 *)

CROSSREFS

Column k=9 of A162663.

Sequence in context: A274246 A161567 A213109 * A042703 A141356 A162633

Adjacent sequences:  A141003 A141004 A141005 * A141007 A141008 A141009

KEYWORD

nonn

AUTHOR

R. J. Mathar, Jul 11 2008

STATUS

approved

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Last modified January 16 15:53 EST 2019. Contains 319195 sequences. (Running on oeis4.)