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%I #7 Jul 22 2014 10:25:03
%S 1,2,4,8,13,22,36,57,89,142,224,354,562,893,1425,2276,3642,5838,9397,
%T 15154,24517,39757,64606,105249,171873,281236,461254,758039,1248269
%N Position of 2^n in A070003.
%e A070003(9397) = 1048576 = 2^20, thus a(20) = 9397.
%Y One less than A244986 from n=2 onward.
%Y Cf. A000079, A070003.
%K nonn
%O 2,2
%A _Antti Karttunen_, Jul 21 2014
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