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A173686 Periodic with period 12: repeat [2,8,2,2,8,5,5,8,5,5,8,2]. 0
2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2, 2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..108.

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

FORMULA

G.f.: ( -x*(2+8*x+2*x^2+3*x^5+5*x^6+8*x^7+2*x^8) ) / ( (x-1)*(x^2+1)*(1+x+x^2)*(x^4-x^2+1) ). - R. J. Mathar, Jul 02 2011

MATHEMATICA

LinearRecurrence[{0, 0, 1, 0, 0, -1, 0, 0, 1}, {2, 8, 2, 2, 8, 5, 5, 8, 5}, 108] (* Ray Chandler, Aug 27 2015 *)

PROG

(PARI) a(n)=[2, 8, 2, 2, 8, 5, 5, 8, 5, 5, 8, 2][(n-1)%12+1]; \\ Jinyuan Wang, Feb 26 2020

CROSSREFS

Cf. A181668.

Sequence in context: A065813 A076344 A307450 * A090975 A257579 A199715

Adjacent sequences:  A173683 A173684 A173685 * A173687 A173688 A173689

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Nov 25 2010

EXTENSIONS

Extended by Ray Chandler, Aug 27 2015

STATUS

approved

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Last modified August 1 18:37 EDT 2021. Contains 346402 sequences. (Running on oeis4.)