A131627 Numbers k such that the decimal expansion of 3^k contains no 1.

1, 2, 3, 5, 6, 10, 14, 18, 25, 27, 29, 33, 37, 43

Offset

1,2

Comments

I conjecture that 43 is the last term.

Links

Table of n, a(n) for n=1..14.

Mathematica

Select[ Range@10000, FreeQ[ IntegerDigits[3^# ], 1] &]

Prog

(Magma) [n: n in [0..1000] | not 1 in Intseq(3^n) ]; // Vincenzo Librandi, May 06 2015

Crossrefs

Cf. similar sequences listed in A131613.

Cf. A007377.

Sequence in context: A286097 A287483 A014853 * A325712 A345170 A237822

Adjacent sequences: A131624 A131625 A131626 * A131628 A131629 A131630

Keyword

base,fini,nonn

Author

Shyam Sunder Gupta, Sep 01 2007

Status

approved