%I
%S 2,3,4,3,4,5,4,5,6,5,4,5,4,5,6,5,6,7,6,5,6,5,6,7,6,7,8,7,6,7,6,5,6,5,
%T 6,7,6,5,6,5,6,7,6,7,8,7,6,7,6,7,8,7,8,9,8,7,8,7,6,7,6,7,8,7,6,7,6,7,
%U 8,7,8,9,8,7,8,7,8,9,8,9,10,9,8,9,8,7,8,7,8,9,8,7,8,7,6,7,6,7,8
%N Abelian complexity function of A064990.
%C a(n) also equals the Abelian complexity function of A189718.
%H Nathan Fox, <a href="/A216197/a216197.py.txt">Python program to generate sequence</a>
%F a(1) = 2; a(3n) = a(n) + 2; a(3n1) = a(n) + 1; a(3n+1) = a(n) + 1.
%Y Cf. A064990, A189718.
%K nonn,easy
%O 1,1
%A _Nathan Fox_, Mar 12 2013
