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Search: id:A052206
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| 1, 16, 100, 408, 1290, 3432, 8052, 17160, 33891, 62920, 110968, 187408, 304980, 480624, 736440, 1100784, 1609509, 2307360, 3249532, 4503400, 6150430, 8288280, 11033100, 14522040, 18915975
(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, pp. 194-196.
Murray R.Spiegel,Calculus of Finite Differences and Difference Equations, "Schaum's Outline Series",McGraw-Hill,1971, pp. 10-20,79-94.
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FORMULA
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a(n)=(9n+7)*C(n+6, 6)/7.
G.f.: (1+8*x)/(1-x)^8.
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CROSSREFS
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Cf. A050405.
Cf. A093644 ((9, 1) Pascal, column m=7).
Sequence in context: A108677 A001249 A014796 this_sequence A125326 A126484 A091100
Adjacent sequences: A052203 A052204 A052205 this_sequence A052207 A052208 A052209
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KEYWORD
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easy,nonn
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AUTHOR
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Barry E. Williams, Jan 28 2000
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