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A063571 Smallest power of 8 having n in its decimal representation. 1
4, 3, 3, 5, 2, 3, 2, 5, 1, 4, 10, 14, 3, 9, 6, 7, 8, 9, 10, 12, 7, 6, 17, 21, 10, 17, 6, 5, 9, 20, 26, 25, 5, 21, 9, 15, 12, 10, 13, 14, 4, 10, 9, 14, 6, 11, 14, 12, 17, 13, 18, 3, 7, 29, 13, 13, 16, 25, 11, 11, 20 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Variant of A062525 allowing only exponents larger than zero. [From R. J. Mathar, Dec 15 2008]

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

MATHEMATICA

a = {}; Do[k = 1; While[ StringPosition[ ToString[8^k], ToString[n] ] == {}, k++ ]; a = Append[a, k], {n, 0, 60} ]; a

sp8[n_]:=Module[{k=1}, While[SequenceCount[IntegerDigits[ 8^k], IntegerDigits[ n]]<1, k++]; k]; Array[sp8, 70, 0] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 07 2017 *)

CROSSREFS

Sequence in context: A222616 A011762 A195780 * A005589 A052360 A263046

Adjacent sequences:  A063568 A063569 A063570 * A063572 A063573 A063574

KEYWORD

base,nonn

AUTHOR

Robert G. Wilson v, Aug 10 2001

STATUS

approved

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)