This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A305370 #26 Apr 26 2022 03:37:14 %S A305370 1,2,3,5,8,15,29,50,103,164,417,649,1324,2684,5348,10226,21298,41538, %T A305370 84652,165034,322262,646648,1283556,2584860,5163368,10271638,20566708, %U A305370 40308350,80758553,161522919,322519008,637135132 %N A305370 Index of 2^n in A109812. %C A305370 It would be nice to have a formula for a(n). %C A305370 The data suggests that a(n) is growing very roughly like 2^n/3.261. - _N. J. A. Sloane_, Mar 29 2022 %H A305370 Rémy Sigrist, <a href="/A305370/a305370.txt">C++ program for A305370</a> %e A305370 A109812(15) = 32 = 2^5, so a(5) = 15. %o A305370 (C++) See Links section. %Y A305370 Cf. A109812, A113233. %K A305370 nonn,more,base %O A305370 0,2 %A A305370 _N. J. A. Sloane_, Jun 02 2018 %E A305370 a(14)-a(22) from _Chai Wah Wu_, Jun 04 2018 %E A305370 a(23)-a(24) from _Giovanni Resta_, Jun 06 2018 %E A305370 a(25)-a(26) from _Rémy Sigrist_, Dec 05 2021 %E A305370 a(27)-a(28) from _Walter Trump_, Apr 13 2022 %E A305370 a(29)-a(31) from _Walter Trump_, Apr 26 2022