%I #5 May 02 2017 10:51:27
%S 1,0,1,0,1,1,1,0,1,0,1,1,1,0,1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,0,1,1,1,0,
%T 1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,0,1,1,1,0,1,0,1,1,1,0,1,0,1,1,1,0,1,0,
%U 1,1,1,0,1,0,1,1,1,0,1,0,1,0,1,0,1,0
%N Fixed point of the morphism 0->11, 1->1010.
%H Clark Kimberling, <a href="/A285625/b285625.txt">Table of n, a(n) for n = 1..10000</a>
%H <a href="/index/Fi#FIXEDPOINTS">Index entries for sequences that are fixed points of mappings</a>
%e 0 -> 11 -> 1010 -> 101011101011-> 1010111010111010101010101110101110101010... ->
%t s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {1, 0, 1, 0}}] &, {0}, 10] (* A285625 *)
%t Flatten[Position[s, 0]] (* A285626 *)
%t Flatten[Position[s, 1]] (* A285627 *)
%Y Cf. A285626, A285627.
%K nonn,easy
%O 1
%A _Clark Kimberling_, May 01 2017