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Search: id:A020782
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| A020782 |
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Expansion of 1/((1-7x)(1-8x)(1-9x)). |
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+0
1
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| 1, 24, 385, 5160, 62401, 706104, 7628545, 79669320, 810888001, 8089258584, 79415935105, 769621605480, 7379461252801, 70134974713464, 661651583000065, 6203106293141640, 57847125937972801, 537010118353326744
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OFFSET
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0,2
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FORMULA
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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]
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CROSSREFS
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Sequence in context: A087292 A081138 A114631 this_sequence A025952 A028031 A042108
Adjacent sequences: A020779 A020780 A020781 this_sequence A020783 A020784 A020785
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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