

A317954


Fixed point of the morphism 1 > 12, 2 > 13, 3 > 14, 4 > 1, starting from a(1) = 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, 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
(list;
graph;
refs;
listen;
history;
text;
internal format)



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



