A030701 - OEIS (original) (raw)

A030701

Decimal expansion of 4^n contains no zeros (probably finite).

28

0, 1, 2, 3, 4, 7, 8, 9, 12, 14, 16, 17, 18, 36, 38, 43

COMMENTS

Integers in A007377 / 2. Conjectured to be finite, and probably complete. - M. F. Hasler, Mar 08 2014

LINKS

Eric Weisstein's World of Mathematics, Zero.

MATHEMATICA

Select[Range[0, 50], DigitCount[4^#, 10, 0]==0&] (* Paolo Xausa, Oct 07 2023 *)

PROG

(PARI) for(n=0, 99, vecmin(digits(4^n))&& print1(n", ")) \\ M. F. Hasler, Mar 07 2014

(Magma) [n: n in [0..500] | not 0 in Intseq(4^n)]; // Vincenzo Librandi, Mar 08 2014

CROSSREFS

For the zeroless numbers (powers x^n), see A238938, A238939, A238940, A195948, A238936, A195908, A195946, A195945, A195942, A195943, A103662.

For the corresponding exponents, see A007377, A008839, A030700, A030701, A008839, A030702, A030703, A030704, A030705, A030706, A195944.

EXTENSIONS

Offset corrected and initial 0 added by M. F. Hasler, Mar 07 2014