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A131629 Numbers n such that decimal expansion of 3^n contains no 3. 3
0, 2, 3, 4, 6, 7, 8, 10, 11, 14, 19, 27, 28, 34, 40, 50, 55, 84 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

I conjecture that 84 is the last term.

LINKS

Table of n, a(n) for n=1..18.

MATHEMATICA

Join[{0}, Select[ Range@10000, FreeQ[ IntegerDigits[3^# ], 3] &]

PROG

(MAGMA) [n: n in [0..1000] | not 3 in Intseq(3^n) ]; // Vincenzo Librandi, May 06 2015

CROSSREFS

Cf. similar sequences listed in A131613.

Cf. A007377, A136291.

Sequence in context: A186511 A066049 A160697 * A167701 A275157 A114149

Adjacent sequences:  A131626 A131627 A131628 * A131630 A131631 A131632

KEYWORD

base,fini,nonn

AUTHOR

Shyam Sunder Gupta, Sep 01 2007

EXTENSIONS

Initial 0 added and Mathematica code adapted by Vincenzo Librandi, May 06 2015

STATUS

approved

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Last modified February 20 17:04 EST 2020. Contains 332080 sequences. (Running on oeis4.)