A269305 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A269305

2^n mod 27 successively displaced by 0, 3, 6, 9, etc.

1, 2, 4, 8, 16, 5, 10, 20, 13, 26, 25, 23, 19, 11, 22, 17, 7, 14, 4, 5, 7, 11, 19, 8, 13, 23, 16, 2, 1, 26, 22, 14, 25, 20, 10, 17, 7, 8, 10, 14, 22, 11, 16, 26, 19, 5, 4, 2, 25, 17, 1, 23, 13, 20, 10, 11, 13, 17, 25, 14, 19, 2, 22, 8, 7, 5, 1, 20

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

COMMENTS

Repeats with period 18*9 = 162.

LINKS

Table of n, a(n) for n=0..67.

FORMULA

a(n) = (2^n + 3*floor(n/18)) mod 27.

MATHEMATICA

Table[Mod[(2^n + 3 Floor[n/18]), 27], {n, 0, 70}] (* Vincenzo Librandi, Feb 23 2016 *)

PROG