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Search: id:A055843
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| A055843 |
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A second order recursive sequence. |
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+0
2
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| 1, 13, 85, 385, 1375, 4147, 11011, 26455, 58630, 121550, 238238, 445094, 797810, 1379210, 2309450, 3759074, 5965487, 9253475, 14060475, 20967375, 30735705, 44352165, 63081525, 88529025, 122713500, 168152556, 227961228, 305965660
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Partial sums of A052181.
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REFERENCES
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A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pps. 194-196.
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FORMULA
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a(n)=(4n+9)*C(n+8, 8)/9.
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EXAMPLE
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G.f.(x)=(1+3x)/(1-x)^10.
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CROSSREFS
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Cf. A052181.
Cf. A093561 ((4, 1) Pascal, column m=9).
Sequence in context: A163688 A010025 A001848 this_sequence A003764 A082036 A037060
Adjacent sequences: A055840 A055841 A055842 this_sequence A055844 A055845 A055846
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KEYWORD
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easy,nonn
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AUTHOR
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Barry E. Williams, May 30 2000
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