%I
%S 1,1,1,2,1,1,2,1,1,2,2,2,2,2,3,2,3,3,2,2,3,1,1,2,3,2,3,3,2,1,4,2,2,3,
%T 3,3,3,3,1,3,3,3,3,3,2,1,5,3,4,4,2,1,3,4,4,3,3,1,5,4,4,3,3,2,4,2,4,4,
%U 2,3,5,4,3,4,4,1,1,4,2,3,4,2,3,1,4,3,5,2,6,5,5,4,5,5,4,3,1,4,6,5,4,1,3,4,3
%N Exponents of powers of 2 displayed in A066671: 2^a[n] is the largest even divisor of A066669(n).
%e 263rd term in A066669 is 769 and Phi[769] = 768 = 3.256, so a(263) = Log[2,256] = Log[2,Phi[769]/3] = Log[2,Phi[A066669(263)]/A066670(263)] = 8.
%Y Cf. A000010, A066669A066672.
%K nonn
%O 1,4
%A _Labos Elemer_, Dec 18 2001
