

A035064


Numbers n such that 2^n does not contain the digit 9 (probably finite).


9



0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 27, 28, 30, 31, 45, 46, 47, 57, 58, 59, 71, 77, 99, 108
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OFFSET

1,3


LINKS

Table of n, a(n) for n=1..37.


MATHEMATICA

Join[{0}, Select[Range@ 1000, FreeQ[IntegerDigits[2^#], 9] &]] (* Vincenzo Librandi, May 06 2015 *)


PROG

(MAGMA) [n: n in [0..1000]  not 9 in Intseq(2^n) ]; // Vincenzo Librandi, May 06 2015


CROSSREFS

Cf. numbers n such that decimal expansion of 2^n contains no k: A007377 (k=0), A035057 (k=1), A034293 (k=2), A035058 (k=3), A035059 (k=4), A035060 (k=5), A035061 (k=6), A035062 (k=7), A035063 (k=8), this sequence (k=9).
Sequence in context: A230776 A130574 A023780 * A113191 A191923 A191922
Adjacent sequences: A035061 A035062 A035063 * A035065 A035066 A035067


KEYWORD

nonn,base


AUTHOR

Patrick De Geest, Nov 15 1998


EXTENSIONS

Initial 0 added by Vincenzo Librandi, May 06 2015
Removed keyword "fini" at the suggestion of Nathan Fox, since it is only a conjecture that this sequence contains only finitely many terms.  N. J. A. Sloane, Mar 03 2016


STATUS

approved



