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%I #26 Apr 26 2022 03:37:14
%S 1,2,3,5,8,15,29,50,103,164,417,649,1324,2684,5348,10226,21298,41538,
%T 84652,165034,322262,646648,1283556,2584860,5163368,10271638,20566708,
%U 40308350,80758553,161522919,322519008,637135132
%N Index of 2^n in A109812.
%C It would be nice to have a formula for a(n).
%C The data suggests that a(n) is growing very roughly like 2^n/3.261. - _N. J. A. Sloane_, Mar 29 2022
%H Rémy Sigrist, <a href="/A305370/a305370.txt">C++ program for A305370</a>
%e A109812(15) = 32 = 2^5, so a(5) = 15.
%o (C++) See Links section.
%Y Cf. A109812, A113233.
%K nonn,more,base
%O 0,2
%A _N. J. A. Sloane_, Jun 02 2018
%E a(14)-a(22) from _Chai Wah Wu_, Jun 04 2018
%E a(23)-a(24) from _Giovanni Resta_, Jun 06 2018
%E a(25)-a(26) from _Rémy Sigrist_, Dec 05 2021
%E a(27)-a(28) from _Walter Trump_, Apr 13 2022
%E a(29)-a(31) from _Walter Trump_, Apr 26 2022
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