OFFSET
1,3
COMMENTS
I conjecture that 106 is the last term.
MATHEMATICA
Join[{0}, Select[ Range@10000, FreeQ[ IntegerDigits[3^# ], 4] &]
PROG
(Magma) [n: n in [0..1000] | not 4 in Intseq(3^n)]; // Vincenzo Librandi, May 06 2015
CROSSREFS
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