A372825 - OEIS

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A372825

Exponents of 3 and 2 in sequence A372823.

0, 0, 1, 2, 2, 4, 3, 5, 4, 7, 5, 8, 6, 10, 7, 12, 8, 13, 9, 15, 10, 16, 11, 18, 12, 20, 13, 21, 14, 23, 15, 24, 16, 26, 17, 27, 18, 29, 19, 31, 20, 32, 21, 34, 22, 35, 23, 37, 24, 39, 25, 40, 26, 42, 27, 43, 28, 45, 29, 46, 30, 48, 31, 50, 32, 51, 33, 53, 34

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OFFSET

0,4

LINKS

Table of n, a(n) for n=0..68.

FORMULA

a(2n) = n, a(2n+1) = least k such that 3^n <= 2^k.

MATHEMATICA

a[n_] := If[EvenQ[n], n/2, Ceiling[((n - 1)/2) Log[3]/Log[2]]]

Table[a[n], {n, 0, 120}]

CROSSREFS

Cf. A372823, A372826.