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A025643 Exponent of 3 (value of i) in n-th number of form 3^i*8^j. 1
0, 1, 0, 2, 1, 3, 0, 2, 4, 1, 3, 5, 0, 2, 4, 6, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 9, 0, 2, 4, 6, 8, 10, 1, 3, 5, 7, 9, 11, 0, 2, 4, 6, 8, 10, 12, 1, 3, 5, 7, 9, 11, 13, 0, 2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15, 0, 2, 4, 6, 8, 10, 12, 14, 16, 1, 3, 5, 7, 9, 11, 13, 15, 17, 0, 2, 4, 6, 8, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

N:= 10^40: # include entries for all 3^i*8^j <= N

map(t -> t[1], sort([seq(seq([i, j], j=0..floor(log[8](N/3^i))), i=0..floor(log[3](N)))], (s, t) -> 3^s[1]*8^s[2]<=3^t[1]*8^t[2]));

CROSSREFS

Cf. A025615, A025672.

Sequence in context: A025641 A025649 A025642 * A127478 A127472 A194665

Adjacent sequences:  A025640 A025641 A025642 * A025644 A025645 A025646

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 29 18:39 EDT 2022. Contains 357090 sequences. (Running on oeis4.)