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A074742
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(n^3 + 6n^2 - n + 12)/6.
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2
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2, 3, 7, 15, 28, 47, 73, 107, 150, 203, 267, 343, 432, 535, 653, 787, 938, 1107, 1295, 1503, 1732, 1983, 2257, 2555, 2878, 3227, 3603, 4007, 4440, 4903, 5397, 5923, 6482, 7075, 7703, 8367, 9068, 9807, 10585, 11403, 12262, 13163, 14107, 15095, 16128, 17207, 18333
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| A. Schultze, Advanced Algebra, Macmillan, London, 1910; p. 552.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index to sequences with linear recurrences with constant coefficients, signature (4,-6,4,-1).
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FORMULA
| G.f.: (2-5x+7x^2-3x^3)/(1-x)^4. a(n)=A027965(n+1), n>0. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 23 2008]
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MATHEMATICA
| Table[(n^3 + 6n^2 - n + 12)/6, {n, 0, 49}] (* Alonso del Arte, Jan 13 2012 *)
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PROG
| (PARI) a(n)=n*(n^2+6*n-1)/6+2 \\ Charles R Greathouse IV, Jan 13 2012
(MAGMA) [(n^3 + 6*n^2 - n + 12)/6: n in [0..50]]; // Vincenzo Librandi, Jan 13 2012
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CROSSREFS
| Sequence in context: A066460 A001276 A006884 * A020873 A049958 A177487
Adjacent sequences: A074739 A074740 A074741 * A074743 A074744 A074745
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KEYWORD
| nonn,easy
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AUTHOR
| Susanna Cuyler (BRUGGED(AT)aol.com), Sep 06 2002
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