A030704 Numbers k such that the decimal expansion of 8^k contains no zeros (probably finite).

0, 1, 2, 3, 5, 6, 8, 9, 11, 12, 13, 17, 24, 27

Offset

1,3

Comments

Integers in A007377 / 3. - M. F. Hasler, Mar 07 2014

Links

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

Eric Weisstein's World of Mathematics, Zero

Mathematica

Select[Range[0, 30], DigitCount[8^#, 10, 0]==0&] (* Harvey P. Dale, Jul 13 2016 *)

Prog

(PARI) select( is(n)=vecmin(digits(8^n)), [0..30]) \\ M. F. Hasler, Mar 07 2014
(Magma) [n: n in [0..500] | not 0 in Intseq(8^n)]; // Vincenzo Librandi, Mar 08 2014

Crossrefs

Cf. A007377 (analog for 2^n), A030700 (for 3^n), A030701 (for 4^n), A008839 (for 5^n), A030702 (for 6^n), A030703 and A195908 (for 7^n), A030705 (for 9^n), A030706 and A195946 (for 11^n), A195944 and A195945 (for 13^n).

Cf. A195942, A195943.

This is row 0 of A305928.

Sequence in context: A224996 A246046 A026428 * A305928 A239013 A332101

Adjacent sequences: A030701 A030702 A030703 * A030705 A030706 A030707

Keyword

nonn,base

Author

Eric W. Weisstein

Extensions

Several edits (offset 1, initial 0, title rephrased) by M. F. Hasler, Mar 07 2014

Status

approved