A285621 Fixed point of the morphism 0->11, 1->1001.

1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0

Offset

1

Links

Clark Kimberling, Table of n, a(n) for n = 1..10000

Index entries for sequences that are fixed points of mappings

Example

0 -> 11 -> 10011001 -> 100111111001100111111001 -> 10011111100110011001100110011001... ->

Mathematica

s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {1, 0, 0, 1}}] &, {0}, 10] (* A285621 *)
Flatten[Position[s, 0]]  (* A285622 *)
Flatten[Position[s, 1]]  (* A285623 *)
SubstitutionSystem[{0->{1, 1}, 1->{1, 0, 0, 1}}, {1}, {5}][[1]] (* Harvey P. Dale, Jul 19 2022 *)

Crossrefs

Cf. A285622, A285623, A285625.

Sequence in context: A284369 A194661 A285427 * A204435 A331313 A267155

Adjacent sequences: A285618 A285619 A285620 * A285622 A285623 A285624

Keyword

nonn,easy

Author

Clark Kimberling, May 01 2017

Status

approved