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A020782 Expansion of 1/((1-7x)(1-8x)(1-9x)). +0
1
1, 24, 385, 5160, 62401, 706104, 7628545, 79669320, 810888001, 8089258584, 79415935105, 769621605480, 7379461252801, 70134974713464, 661651583000065, 6203106293141640, 57847125937972801, 537010118353326744 (list; graph; listen)
OFFSET

0,2

FORMULA

If we define f(m,j,x)=sum(binomial(m,k)*stirling2(k,j)*x^(m-k),k=j..m) then a(n-2)=f(n,2,7), (n>=2). [From Milan R. Janjic (agnus(AT)blic.net), Apr 26 2009]

CROSSREFS

Sequence in context: A087292 A081138 A114631 this_sequence A025952 A028031 A042108

Adjacent sequences: A020779 A020780 A020781 this_sequence A020783 A020784 A020785

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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