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

Author

Paul Curtz, Oct 27 2008

Keywords

• nonn

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).

Programs

Magma

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

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

Extensions

Edited by R. J. Mathar, Dec 08 2008