A317954 Fixed point of the morphism 1 -> 12, 2 -> 13, 3 -> 14, 4 -> 1, starting from a(1) = 1.

1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

A:= [1]:
for n from 1 while nops(A) < 1000 do
  A:= subs([1=(1, 2), 2=(1, 3), 3=(1, 4), 4=1], A)
od:
A; # Robert Israel, Aug 21 2018

Mathematica

Nest[Flatten[#/.{0 -> {0, 1}, 1 -> {1, 2}, 2 -> {2, 0}}] &, {0}, 7] (* G. C. Greubel, Jan 02 2019 *)

Crossrefs

Cf. A003849, A092782, A100619, A317955.

Sequence in context: A156249 A187808 A317673 * A164677 A001511 A265331

Adjacent sequences: A317951 A317952 A317953 * A317955 A317956 A317957

Keyword

nonn

Author

N. J. A. Sloane and Doron Zeilberger, Aug 21 2018

Status

approved