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A030701
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Decimal expansion of 4^n contains no zeros (probably finite).
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28
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0, 1, 2, 3, 4, 7, 8, 9, 12, 14, 16, 17, 18, 36, 38, 43
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OFFSET
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1,3
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COMMENTS
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Integers in A007377 / 2. Conjectured to be finite, and probably complete. - M. F. Hasler, Mar 08 2014
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LINKS
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Eric Weisstein's World of Mathematics, Zero.
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MATHEMATICA
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Select[Range[0, 50], DigitCount[4^#, 10, 0]==0&] (* Paolo Xausa, Oct 07 2023 *)
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PROG
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(PARI) for(n=0, 99, vecmin(digits(4^n))&& print1(n", ")) \\ M. F. Hasler, Mar 07 2014
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CROSSREFS
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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.
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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Offset corrected and initial 0 added by M. F. Hasler, Mar 07 2014
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STATUS
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approved
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