A131627 - OEIS

%I #10 Sep 08 2022 08:45:31

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

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

%C I conjecture that 43 is the last term.

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

%o (Magma) [n: n in [0..1000] | not 1 in Intseq(3^n) ]; // _Vincenzo Librandi_, May 06 2015

%Y Cf. similar sequences listed in A131613.

%Y Cf. A007377.

%K base,fini,nonn

%O 1,2

%A _Shyam Sunder Gupta_, Sep 01 2007