A131614 Numbers k such that the decimal expansion of 3^k contains no 8.

0, 1, 2, 3, 5, 6, 8, 10, 11, 12, 13, 16, 17, 19, 21, 33, 36, 51, 55, 56, 100

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