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A030705
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Numbers k such that the decimal expansion of 9^k contains no zeros (probably finite).
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27
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0, 1, 2, 3, 4, 6, 7, 12, 13, 14, 17, 34
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OFFSET
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1,3
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COMMENTS
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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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Reap[For[n = 0, n < 100, n++, If[FreeQ[IntegerDigits[9^n], 0], Sow[n]]]][[2, 1]] (* Jean-François Alcover, Oct 04 2017 *)
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PROG
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(PARI) select( is(n)=vecmin(digits(9^n)), [0..39]) \\ M. F. Hasler, Mar 07 2014
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CROSSREFS
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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 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
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STATUS
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approved
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