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A071230 n*(6*n^2-7*n+3)/2. 1
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; text; internal format)
OFFSET

0,3

REFERENCES

T. A. Gulliver, Sequences from Arrays of Integers, Int. Math. Journal, Vol. 1, No. 4, pp. 323-332, 2002.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..2000

FORMULA

a(n) = +4*a(n-1) -6*a(n-2) +4*a(n-3) -1*a(n-4)

MATHEMATICA

Table[n*(6*n^2 - 7*n + 3)/2, {n, 0, 40}]

PROG

(MAGMA) [n*(6*n^2-7*n+3)/2: n in [0..50]]; // Vincenzo Librandi, Jun 14 2011

CROSSREFS

Sequence in context: A176617 A254895 A195024 * A027000 A198160 A029531

Adjacent sequences:  A071227 A071228 A071229 * A071231 A071232 A071233

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jun 11 2002

EXTENSIONS

More terms from Robert G. Wilson v, Jun 12 2002

STATUS

approved

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Last modified February 24 14:41 EST 2018. Contains 299623 sequences. (Running on oeis4.)