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 A305370 Index of 2^n in A109812. 11
 1, 2, 3, 5, 8, 15, 29, 50, 103, 164, 417, 649, 1324, 2684, 5348, 10226, 21298, 41538, 84652, 165034, 322262, 646648, 1283556, 2584860, 5163368, 10271638, 20566708, 40308350, 80758553, 161522919, 322519008, 637135132 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS It would be nice to have a formula for a(n). The data suggests that a(n) is growing very roughly like 2^n/3.261. - N. J. A. Sloane, Mar 29 2022 LINKS Table of n, a(n) for n=0..31. Rémy Sigrist, C++ program for A305370 EXAMPLE A109812(15) = 32 = 2^5, so a(5) = 15. PROG (C++) See Links section. CROSSREFS Cf. A109812, A113233. Sequence in context: A049861 A130476 A096592 * A192571 A215525 A192645 Adjacent sequences: A305367 A305368 A305369 * A305371 A305372 A305373 KEYWORD nonn,more,base AUTHOR N. J. A. Sloane, Jun 02 2018 EXTENSIONS a(14)-a(22) from Chai Wah Wu, Jun 04 2018 a(23)-a(24) from Giovanni Resta, Jun 06 2018 a(25)-a(26) from Rémy Sigrist, Dec 05 2021 a(27)-a(28) from Walter Trump, Apr 13 2022 a(29)-a(31) from Walter Trump, Apr 26 2022 STATUS approved

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Last modified August 11 05:23 EDT 2024. Contains 375059 sequences. (Running on oeis4.)