The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A191476 Values of j in the numbers 2^i*3^j, i >= 1, j >= 1, arranged in increasing order (A033845). 7
 1, 1, 2, 1, 2, 1, 3, 2, 1, 3, 2, 4, 1, 3, 2, 4, 1, 3, 5, 2, 4, 1, 3, 5, 2, 4, 6, 1, 3, 5, 2, 4, 6, 1, 3, 5, 7, 2, 4, 6, 1, 3, 5, 7, 2, 4, 6, 1, 8, 3, 5, 7, 2, 4, 6, 1, 8, 3, 5, 7, 2, 9, 4, 6, 1, 8, 3, 5, 7, 2, 9, 4, 6, 1, 8, 3, 10, 5, 7, 2, 9, 4, 6, 1, 8, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS This is the signature sequence of log(2)/log(3) (compare A022328). - N. J. A. Sloane, May 26 2024 LINKS Zak Seidov, Table of n, a(n) for n = 1..10000 Index entries for sequences related to signature sequences EXAMPLE a(10) = 3 because A033845(10) = 108 = 2^2*3^3. a(100) = 7 because A033845(100) = 59872 = 2^8*3^7. a(1000) = 1 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][[2, 2]], {i, t}] (* T. D. Noe, Aug 31 2012 *) CROSSREFS Cf. A033845 (numbers 2^i*3^j), A191475 (values of i). A022329 (= a(n)-1) is an essentially identical sequence. See also A022328. Sequence in context: A292224 A023130 A084532 * A134583 A087467 A231568 Adjacent sequences: A191473 A191474 A191475 * A191477 A191478 A191479 KEYWORD nonn AUTHOR Zak Seidov, Aug 30 2012 EXTENSIONS Edited by N. J. A. Sloane, May 26 2024 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 15 12:56 EDT 2024. Contains 374332 sequences. (Running on oeis4.)