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A131616
Numbers k such that the decimal expansion of 3^k contains no 6.
1
0, 1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 15, 18, 23, 32, 35, 42, 55, 104
OFFSET
1,3
COMMENTS
I conjecture that 104 is the last term.
MATHEMATICA
Join[{0}, Select[ Range@10000, FreeQ[ IntegerDigits[3^# ], 6] &]
PROG
(Magma) [n: n in [0..1000] | not 6 in Intseq(3^n) ]; // Vincenzo Librandi, May 06 2015
CROSSREFS
Cf. similar sequences listed in A131613.
Cf. A007377.
Sequence in context: A050687 A098908 A097296 * A175857 A173919 A205666
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