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%I #3 Oct 15 2013 22:32:24
%S 0,1,4,2,4,4,3,4,4,4,6,5,6,6,8,7,10,8,10,10,8,10,10,10,10,9,10,10,10,
%T 10,10,12,11,12,12,14,13,14,16,14,16,16,16,15,16,16,16,16,18,17,18,18,
%U 20,19,20,22,20,22,22,21,22,22,22
%N Exponents of power of 2 of the largest terms arising in the 3x+1 iterations started with terms of A095381.
%F a[n]=Log[2, A025586[A095381(n)]]
%Y Cf. A025586, A087256, A095381.
%K nonn
%O 1,3
%A _Labos Elemer_, Jun 14 2004
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