login
A284490
1-limiting word of the morphism 0->1, 1->0011.
4
1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1
OFFSET
1
COMMENTS
The morphism 0->1, 1->0011 has two limiting words. If the number of iterations is even, the 0-word evolves from 0 -> 1 -> 0011 -> 1100110011 -> 0011001111001100111100110011; if the number of iterations is odd, the 1-word evolves from 0 -> 1 -> 0011 -> 1100110011 ->, as in A284490.
LINKS
MATHEMATICA
s = Nest[Flatten[# /. {0 -> {1}, 1 -> {0, 0, 1, 1}}] &, {0}, 15]; (* A284490 *)
Flatten[Position[s, 0]]; (* A284491 *)
Flatten[Position[s, 1]]; (* A284492 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 04 2017
STATUS
approved