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A212811
Iterate the morphism 1->1123, 2->223, 3->133 starting with 1.
1
1, 1, 2, 3, 1, 1, 2, 3, 2, 2, 3, 1, 3, 3, 1, 1, 2, 3, 1, 1, 2, 3, 2, 2, 3, 1, 3, 3, 2, 2, 3, 2, 2, 3, 1, 3, 3, 1, 1, 2, 3, 1, 3, 3, 1, 3, 3, 1, 1, 2, 3, 1, 1, 2, 3, 2, 2, 3, 1, 3, 3, 1, 1, 2, 3, 1, 1, 2, 3, 2, 2, 3, 1, 3, 3, 2, 2, 3, 2, 2, 3, 1, 3, 3, 1, 1, 2, 3, 1, 3, 3, 1, 3, 3, 2, 2, 3, 2, 2, 3, 1, 3, 3, 2, 2, 3, 2, 2, 3, 1, 3, 3, 1, 1, 2, 3, 1, 3, 3, 1, 3, 3, 1, 1, 2, 3, 1, 1, 2, 3, 2, 2, 3, 1, 3, 3, 1, 1, 2, 3, 1, 3, 3, 1, 3, 3, 1, 1, 2, 3, 1, 3, 3, 1, 3, 3
OFFSET
1,3
COMMENTS
This is an example of an infinite ternary sequence in which no three blocks occur consecutively which are permutations of each other.
LINKS
F. M. Dekking, Strongly nonrepetitive sequences and progression-free sets, J. Combin. Theory Ser. A 27 (1979), no. 2, 181--185. MR0542527 (81b:05027).
CROSSREFS
Cf. A212810.
Sequence in context: A007884 A190593 A276336 * A338854 A330957 A352924
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 29 2012
STATUS
approved