|
| |
|
|
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
|
| |
|
|
