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A083570 A de Bruijn sequence of length 9 over {0, 1, 2}, repeated. 1
0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2, 0, 0, 1, 1, 2, 2, 1, 0, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Each of the 9 pairs 00, 01, ..., 22 occurs exactly once in each period.

LINKS

Table of n, a(n) for n=0..98.

F. Mendivil, Fractals, graphs and fields, Amer. Math. Monthly, 110 (No. 6, 2003), 503-515.

FORMULA

a(n) = (1/36)*{9*(n mod 9)-7*[(n+1) mod 9]+5*[(n+2) mod 9]+5*[(n+3) mod 9]+[(n+4) mod 9]-3*[(n+5) mod 9]+[(n+6) mod 9]-3*[(n+7) mod 9]+[(n+8) mod 9]}, with n>=0. - Paolo P. Lava, Aug 24 2007

MATHEMATICA

PadRight[{}, 99, {0, 0, 1, 1, 2, 2, 1, 0, 2}] (* Harvey P. Dale, Nov 23 2011 *)

CROSSREFS

Sequence in context: A141335 A133624 A030110 * A287407 A153240 A153241

Adjacent sequences:  A083567 A083568 A083569 * A083571 A083572 A083573

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 14 2003

STATUS

approved

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Last modified January 19 18:27 EST 2019. Contains 319309 sequences. (Running on oeis4.)