A191476 Values of j of the numbers 2^i*3^j (A033845).

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

Offset

1,3

Comments

Not the same as A134583.

Links

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

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), A134583.

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

Status

approved