A119538 - OEIS

%I #2 Mar 30 2012 17:31:18

%S 0,1,2,1,2,4,2,3,6,1,2,4,2,3,6,4,5,10,2,3,6,3,4,8,6,7,14,1,2,4,2,3,6,

%T 4,5,10,2,3,6,3,4,8,6,7,14,4,5,10,5,6,12,10,11,22,2,3,6,3,4,8,6,7,14,

%U 3,4,8,4,5,10,8,9,18,6,7,14,7,8,16,14,15,30,1,2,4,2,3,6,4,5,10,2,3,6,3,4,8

%N Fixed point of the morphism a -> {a, a + 1, 2a + 2} beginning with 0.

%t Nest[Flatten[ #1 /. a_Integer -> {a, a + 1, 2a + 2}] &, {0}, 5]

%Y Cf. A000120.

%K nonn

%O 1,3

%A _Robert G. Wilson v_, Jul 27 2006