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A071230
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n*(6*n^2-7*n+3)/2.
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1
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0, 1, 13, 54, 142, 295, 531, 868, 1324, 1917, 2665, 3586, 4698, 6019, 7567, 9360, 11416, 13753, 16389, 19342, 22630, 26271, 30283, 34684, 39492, 44725, 50401, 56538, 63154, 70267, 77895, 86056, 94768, 104049, 113917, 124390, 135486
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| T. A. Gulliver, Sequences from Arrays of Integers, Int. Math. Journal, Vol. 1, No. 4, pp. 323-332, 2002.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..2000
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FORMULA
| a(n) = +4*a(n-1) -6*a(n-2) +4*a(n-3) -1*a(n-4)
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MATHEMATICA
| Table[n*(6*n^2 - 7*n + 3)/2, {n, 0, 40}]
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PROG
| (MAGMA) [n*(6*n^2-7*n+3)/2: n in [0..50]]; // Vincenzo Librandi, Jun 14 2011
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CROSSREFS
| Sequence in context: A201486 A176617 A195024 * A027000 A198160 A029531
Adjacent sequences: A071227 A071228 A071229 * A071231 A071232 A071233
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jun 11 2002
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 12 2002
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