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1, 11, 60, 228, 690, 1782, 4092, 8580, 16731, 30745, 53768, 90168, 145860, 228684, 348840, 519384, 756789, 1081575, 1519012, 2099900, 2861430, 3848130, 5112900, 6718140, 8736975, 11254581, 14369616, 18195760, 22863368, 28521240, 35338512
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 194-196.
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LINKS
| Matthew M. Conroy, Home page (listed instead of email address)
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FORMULA
| a(n)=C(n+6, 6)*(4n+7)/7.
G.f.: (1+3*x)/(1-x)^8.
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CROSSREFS
| Cf. A051947.
Cf. A093561 ((4, 1) Pascal, column m=7).
Sequence in context: A076676 A044149 A044530 * A066999 A055826 A156704
Adjacent sequences: A050480 A050481 A050482 * A050484 A050485 A050486
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KEYWORD
| easy,nonn
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AUTHOR
| Barry E. Williams, Dec 26 1999
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EXTENSIONS
| G.f. proposed by Maksym Voznyy checked and corrected by R. J. Mathar, Sep 16 2009.
More terms from Matthew M. Conroy, Apr 16 2001
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