A146082 a(n) = A146081(n) mod 9.

2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0

Offset

0,1

Comments

A periodic double sawtooth pattern of positive even and odd numbers.

Links

G. C. Greubel, Table of n, a(n) for n = 0..10000

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

Formula

a(n) = A131669(n+2)-1.

Period 9: a(n+9)=a(n).

a(n) = (74*n + 110) mod 9. - G. C. Greubel, Jan 29 2016

Mathematica

a := LinearRecurrence[{2, -1}, {110, 184}, 100];
Mod[a, 9] (* G. C. Greubel, Jan 29 2016 *)
PadRight[{}, 120, {2, 4, 6, 8, 1, 3, 5, 7, 0}] (* Harvey P. Dale, Sep 18 2016 *)

Prog

(Magma) &cat[[2, 4, 6, 8, 1, 3, 5, 7, 0]^^10]; // Vincenzo Librandi, Jan 30 2016

Crossrefs

Sequence in context: A036211 A127353 A032763 * A169909 A180592 A004092

Adjacent sequences: A146079 A146080 A146081 * A146083 A146084 A146085

Keyword

nonn

Author

Paul Curtz, Oct 27 2008

Extensions

Edited by R. J. Mathar, Dec 08 2008

Status

approved