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A127147 Q(n,5), where Q(m,k) is defined in A127080 and A127137. 3
43, 28, 15, 4, -5, -12, -17, -20, -21, -20, -17, -12, -5, 4, 15, 28, 43, 60, 79, 100, 123, 148, 175, 204, 235, 268, 303, 340, 379, 420, 463, 508, 555, 604, 655, 708, 763, 820, 879, 940, 1003, 1068, 1135, 1204, 1275, 1348, 1423, 1500, 1579, 1660, 1743, 1828, 1915, 2004, 2095, 2188 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

V. van der Noort and N. J. A. Sloane, Paper in preparation, 2007.

LINKS

Colin Barker, Table of n, a(n) for n = 0..1000

Index to sequences with linear recurrences with constant coefficients, signature (3,-3,1).

FORMULA

a(n) = n^2-16*n+43.

a(n) = 3*a(n-1)-3*a(n-2)+a(n-3). G.f.: -(60*x^2-101*x+43) / (x-1)^3. - Colin Barker, Nov 12 2014

MATHEMATICA

CoefficientList[Series[(60 x^2 - 101 x + 43) / (1 - x)^3, {x, 0, 60}], x] (* Vincenzo Librandi, Nov 12 2014 *)

PROG

(PARI) Vec(-(60*x^2-101*x+43)/(x-1)^3 + O(x^100)) \\ Colin Barker, Nov 12 2014

(MAGMA) [n^2-16*n+43: n in [0..60]]; // Vincenzo Librandi, Nov 12 2014

CROSSREFS

A row of A127080.

Sequence in context: A225210 A033363 A187088 * A051614 A165864 A223746

Adjacent sequences:  A127144 A127145 A127146 * A127148 A127149 A127150

KEYWORD

sign,easy

AUTHOR

N. J. A. Sloane, Mar 24 2007

STATUS

approved

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Last modified December 21 19:36 EST 2014. Contains 252325 sequences.