A131015 Period 12: repeat 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4.

1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2

Offset

0,3

Comments

Also the decimal expansion of 1018994/9000009. [From R. J. Mathar, Feb 07 2009]

Links

Table of n, a(n) for n=0..104.

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

Formula

G.f.: (1+2x^2-x^3-x^5+4x^6)/((1-x)(1+x^2)(1-x^2+x^4)). a(n)=a(n-1)-a(n-6)+a(n-7). [From R. J. Mathar, Feb 07 2009]

Mathematica

PadRight[{}, 120, {1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4}] (* Harvey P. Dale, Jan 12 2016 *)

Crossrefs

Sequence in context: A252731 A239066 A239067 * A342769 A130195 A071048

Adjacent sequences: A131012 A131013 A131014 * A131016 A131017 A131018

Keyword

nonn,easy

Author

Paul Curtz, Sep 22 2007

Extensions

More periods from R. J. Mathar, Feb 07 2009

Status

approved