

A030705


Numbers k such that the decimal expansion of 9^k contains no zeros (probably finite).


27



0, 1, 2, 3, 4, 6, 7, 12, 13, 14, 17, 34
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OFFSET

1,3


COMMENTS



LINKS

Eric Weisstein's World of Mathematics, Zero


MATHEMATICA

Reap[For[n = 0, n < 100, n++, If[FreeQ[IntegerDigits[9^n], 0], Sow[n]]]][[2, 1]] (* JeanFrançois Alcover, Oct 04 2017 *)


PROG

(PARI) select( is(n)=vecmin(digits(9^n)), [0..39]) \\ M. F. Hasler, Mar 07 2014


CROSSREFS



KEYWORD

nonn,base


AUTHOR



EXTENSIONS

Offset changed to 1 and initial 0 added by M. F. Hasler, Mar 07 2014
Removed keyword "fini" (as in A035064) since it is only a conjecture that this sequence contains only finitely many terms.  Georg Fischer, Mar 12 2020


STATUS

approved



