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A124649 Numbers n such that n^i (i=1..8) are all zeroless. 5
1, 2, 3, 6, 68 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

No other terms < 10^6. Is the sequence finite?

Subsequence of A124648. No other terms below 10^8. - Michel Marcus, Oct 11 2013

a(6) > 3.3*10^16, if it exists. - Giovanni Resta, Sep 07 2018

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

68^i (i=1..8)= 68, 4624, 314432, 21381376, 1453933568, 98867482624, 6722988818432, 457163239653376 all zeroless.

PROG

(PARI) isok(n) = {for (i = 1, 8, if (! vecmin(digits(n^i)), return (0)); ); return (1); } \\ Michel Marcus, Oct 11 2013

CROSSREFS

Cf. A104264.

Sequence in context: A018415 A137073 A018434 * A018448 A018456 A018474

Adjacent sequences:  A124646 A124647 A124648 * A124650 A124651 A124652

KEYWORD

nonn,base,more

AUTHOR

Zak Seidov, Dec 22 2006

STATUS

approved

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Last modified September 22 02:31 EDT 2021. Contains 347605 sequences. (Running on oeis4.)