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 A191475 Values of i in the numbers 2^i*3^j, i >= 1, j >= 1 (A033845). 8
 1, 2, 1, 3, 2, 4, 1, 3, 5, 2, 4, 1, 6, 3, 5, 2, 7, 4, 1, 6, 3, 8, 5, 2, 7, 4, 1, 9, 6, 3, 8, 5, 2, 10, 7, 4, 1, 9, 6, 3, 11, 8, 5, 2, 10, 7, 4, 12, 1, 9, 6, 3, 11, 8, 5, 13, 2, 10, 7, 4, 12, 1, 9, 6, 14, 3, 11, 8, 5, 13, 2, 10, 7, 15, 4, 12, 1, 9, 6, 14, 3, 11 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Signature sequence of log_2(3) (A020857). - R. J. Mathar, May 27 2024 LINKS Zak Seidov, Table of n, a(n) for n = 1..10000 Index entries for sequences related to signature sequences EXAMPLE a(10) = 2 because A033845(10) = 108 = 2^2*3^3. a(100) = 2 because A033845(100) = 59872 = 2^8*3^7. a(1000) = 56 because A033845(1000) = 216172782113783808 = 2^56*3^1. MATHEMATICA mx = 1000000; t = Select[Sort[Flatten[Table[2^i 3^j, {i, Log[2, mx]}, {j, Log[3, mx]}]]], # <= mx &]; Table[FactorInteger[i][[1, 2]], {i, t}] (* T. D. Noe, Aug 31 2012 *) CROSSREFS Cf. A003586 (numbers 2^i*3^j, i >= 0, j >= 0), A033845 (numbers 2^i*3^j, i >= 1, j >= 1), A191476 (values of j), A020857. Sequence in context: A058933 A087470 A373215 * A158456 A084531 A023129 Adjacent sequences: A191472 A191473 A191474 * A191476 A191477 A191478 KEYWORD nonn AUTHOR Zak Seidov, Aug 30 2012 EXTENSIONS Edited by N. J. A. Sloane, May 26 2024 STATUS approved

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Last modified August 2 19:53 EDT 2024. Contains 374875 sequences. (Running on oeis4.)