A134300 Period 8: repeat [6,-4,2,-1,2,-4,6,-7].

6, -4, 2, -1, 2, -4, 6, -7, 6, -4, 2, -1, 2, -4, 6, -7, 6, -4, 2, -1, 2, -4, 6, -7, 6, -4, 2, -1, 2, -4, 6, -7, 6, -4, 2, -1, 2, -4, 6, -7, 6, -4, 2, -1, 2, -4, 6, -7

Offset

0,1

Links

Table of n, a(n) for n=0..47.

Index entries for linear recurrences with constant coefficients, signature (-1,0,0,-1,-1).

Formula

From Chai Wah Wu, Jun 04 2016: (Start)

a(n) = - a(n-1) - a(n-4) - a(n-5) for n > 4.

G.f.: (7*x^4 + x^3 - 2*x^2 + 2*x + 6)/((x + 1)*(x^4 + 1)). (End)

Mathematica

PadRight[{}, 120, {6, -4, 2, -1, 2, -4, 6, -7}] (* Harvey P. Dale, Jun 01 2018 *)

Prog

(PARI) a(n)=[6, -4, 2, -1, 2, -4, 6, -7][n%8+1] \\ Charles R Greathouse IV, Jul 13 2016

Crossrefs

Sequence in context: A157701 A193076 A073449 * A226655 A340722 A199741

Adjacent sequences: A134297 A134298 A134299 * A134301 A134302 A134303

Keyword

sign,easy

Author

Paul Curtz, Jan 16 2008

Status

approved