login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A049307 Numbers k such that k is a substring of 9^k. 7
5, 7, 9, 25, 26, 31, 37, 43, 46, 47, 48, 53, 59, 60, 61, 63, 68, 69, 70, 72, 74, 76, 80, 85, 87, 88, 89, 91, 94, 97, 101, 104, 107, 124, 132, 135, 140, 148, 158, 166, 170, 180, 187, 190, 199, 209, 211, 215, 231, 243, 244, 256, 266, 270, 271, 279, 283, 288, 289, 291 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..60.

MAPLE

op(select(n->searchtext(convert(n, string), convert(9^n, string))>0, [$1..291])); # Paolo P. Lava, Sep 05 2018

CROSSREFS

Cf. A032740, A049301, A049302, A049303, A049304, A049305, A049306.

Sequence in context: A276734 A268410 A029650 * A050113 A050888 A264349

Adjacent sequences:  A049304 A049305 A049306 * A049308 A049309 A049310

KEYWORD

nonn,base,easy

AUTHOR

David W. Wilson

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 20 14:22 EDT 2018. Contains 316381 sequences. (Running on oeis4.)