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A232495 9*n^3/2 - 21*n^2/2 + 8*n - 4. 1
6, 47, 148, 336, 638, 1081, 1692, 2498, 3526, 4803, 6356, 8212, 10398, 12941, 15868, 19206, 22982, 27223, 31956, 37208, 43006, 49377, 56348, 63946, 72198, 81131, 90772, 101148, 112286, 124213, 136956, 150542, 164998, 180351, 196628, 213856, 232062, 251273 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Bruno Berselli, Table of n, a(n) for n = 2..1000

J. Draisma, E. Horobet, G. Ottaviani, B. Sturmfels and R. K. Thomas, The Euclidean distance degree of an algebraic variety, arXiv preprint arXiv: 1309.0049, 2013. See Conjecture 3.4.

Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).

FORMULA

G.f.: x^2*(6 + 23*x - 4*x^2 + 2*x^3) / (1 - x)^4. [Bruno Berselli, Dec 03 2013]

MATHEMATICA

Table[9 n^3/2 - 21 n^2/2 + 8 n - 4, {n, 2, 40}] (* Bruno Berselli, Dec 03 2013 *)

PROG

(MAGMA) [9*n^3/2-21*n^2/2+8*n-4: n in [2..40]]; Bruno Berselli, Dec 03 2013

CROSSREFS

Sequence in context: A145506 A256160 A184725 * A267233 A027012 A160609

Adjacent sequences:  A232492 A232493 A232494 * A232496 A232497 A232498

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Dec 03 2013

STATUS

approved

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Last modified August 20 18:56 EDT 2019. Contains 326154 sequences. (Running on oeis4.)