A153509 Period 9: repeat [6, 6, 6, 3, 3, 3, 0, 0, 0].

6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 6, 6, 6, 3, 3, 3

Offset: 0

Author

Paul Curtz, Dec 28 2008

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A130851.

Programs

Mathematica

PadRight[{},9*12,{6,6,6,3,3,3,0,0,0}] (* Harvey P. Dale, Dec 17 2012 *)

PARI

a(n)=[6,6,6,3,3,3,0,0,0][n%9+1] \\ Charles R Greathouse IV, Jul 13 2016

Formula

G.f.: 3*(2+x^3)/((1-x)*(1+x^3+x^6)). - R. J. Mathar, Jan 21 2009

a(n) = 3*((3-floor((n+3)/3)) mod 3). - Wesley Ivan Hurt, Apr 27 2020

Extensions

More periods from R. J. Mathar, Jan 21 2009