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A131614 Numbers k such that the decimal expansion of 3^k contains no 8. 1
0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 16, 17, 19, 21, 33, 36, 51, 55, 56, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

I conjecture that 100 is the last term.

LINKS

Table of n, a(n) for n=1..21.

MATHEMATICA

Join[{0}, Select[ Range@10000, FreeQ[ IntegerDigits[3^# ], 8] &]

PROG

(MAGMA) [n: n in [0..1000] | not 8 in Intseq(3^n) ]; // Vincenzo Librandi, May 06 2015

CROSSREFS

Cf. similar sequences listed in A131613.

Cf. A007377.

Sequence in context: A187899 A024609 A167056 * A275202 A233592 A320773

Adjacent sequences:  A131611 A131612 A131613 * A131615 A131616 A131617

KEYWORD

base,fini,nonn

AUTHOR

Shyam Sunder Gupta, Sep 01 2007

EXTENSIONS

Adapted Mma and initial 0 added by Vincenzo Librandi, May 06 2015

STATUS

approved

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Last modified December 6 22:25 EST 2021. Contains 349567 sequences. (Running on oeis4.)