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A049304 Numbers n such that n is a substring of 6^n. 2
6, 7, 9, 13, 21, 22, 23, 29, 39, 40, 42, 44, 45, 48, 53, 55, 56, 60, 63, 64, 65, 67, 68, 69, 70, 73, 74, 75, 76, 77, 79, 82, 83, 87, 89, 92, 93, 94, 98, 105, 107, 127, 129, 131, 134, 137, 143, 147, 152, 163, 165, 167, 174, 179, 184, 189, 197, 224, 226, 227, 234, 240 (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(6^n, string))>0, [$1..240])); # Paolo P. Lava, Sep 05 2018

MATHEMATICA

Select[Range[250], SequenceCount[IntegerDigits[6^#], IntegerDigits[#]]>0&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Aug 03 2018 *)

CROSSREFS

Cf. A032740, A049301-A049307.

Sequence in context: A022938 A048585 A169761 * A168614 A045014 A047591

Adjacent sequences:  A049301 A049302 A049303 * A049305 A049306 A049307

KEYWORD

nonn,base,easy

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 14 11:36 EDT 2019. Contains 327996 sequences. (Running on oeis4.)