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A049306 Numbers n such that n is a substring of 8^n. 2
4, 6, 7, 10, 13, 17, 18, 28, 31, 33, 36, 38, 42, 44, 47, 48, 49, 52, 54, 56, 58, 60, 63, 64, 67, 68, 69, 76, 77, 79, 81, 82, 83, 85, 86, 89, 90, 91, 94, 97, 112, 115, 124, 130, 135, 165, 173, 176, 178, 189, 193, 195, 206, 208, 215, 221, 225, 249, 251, 252, 253, 256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..62.

MAPLE

op(select(n->searchtext(convert(n, string), convert(8^n, string))>0, [$1..256])); # Paolo P. Lava, Sep 05 2018

MATHEMATICA

Select[Range[300], SequenceCount[IntegerDigits[8^#], IntegerDigits[#]]>0&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 16 2018 *)

CROSSREFS

Cf. A032740, A049301-A049307.

Sequence in context: A286485 A277572 A107622 * A023635 A317649 A265036

Adjacent sequences:  A049303 A049304 A049305 * A049307 A049308 A049309

KEYWORD

nonn,base,easy

AUTHOR

David W. Wilson

STATUS

approved

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Last modified March 26 10:18 EDT 2019. Contains 321491 sequences. (Running on oeis4.)