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A191475 Values of i of the numbers 2^i*3^j (A033845). 5
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

Not the same as A158456.

LINKS

Zak Seidov, Table of n, a(n) for n = 1..10000

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. A033845 (numbers  2^i*3^j), A191476 (values of j), A158456.

Sequence in context: A336472 A058933 A087470 * A158456 A084531 A023129

Adjacent sequences:  A191472 A191473 A191474 * A191476 A191477 A191478

KEYWORD

nonn

AUTHOR

Zak Seidov, Aug 30 2012

STATUS

approved

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Last modified May 22 09:50 EDT 2022. Contains 353949 sequences. (Running on oeis4.)