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Search: id:A055848
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| A055848 |
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A second order recursive sequence. |
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+0
2
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| 1, 15, 105, 495, 1815, 5577, 15015, 36465, 81510, 170170, 335478, 629850, 1133730, 1967070, 3304290, 5393454, 8580495, 13339425, 20309575, 30341025, 44549505, 64382175, 91695825, 128849175, 178811100, 245286756, 332863740, 447180580
(list; graph; listen)
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OFFSET
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0,2
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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)=(2n+3)*C(n+8, 8)/3. G.f.(x)=(1+5x)/(1-x)^10.
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CROSSREFS
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Cf. A054487.
Cf. A093563 ((6, 1) Pascal, column m=9). Partial sums of A054487.
Sequence in context: A022610 A006857 A000478 this_sequence A058085 A060218 A165892
Adjacent sequences: A055845 A055846 A055847 this_sequence A055849 A055850 A055851
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KEYWORD
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easy,nonn
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AUTHOR
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Barry E. Williams, Jun 03 2000
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