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A050746 Numbers k such that the decimal expansion of k^7 contains no pair of consecutive equal digits. 2
0, 1, 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 14, 15, 16, 19, 24, 25, 26, 27, 28, 29, 32, 36, 46, 52, 56, 57, 61, 62, 63, 71, 74, 79, 82, 83, 91, 101, 107, 111, 125, 132, 135, 136, 147, 149, 152, 153, 154, 159, 161, 163, 171, 173, 175, 194, 204, 207, 211, 212, 221, 225, 227 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

filter:= proc(n) local L;

  L:= convert(n^7, base, 10);

  not member(0, L[1..-2]-L[2..-1])

end proc:

select(filter, [$0..1000]); # Robert Israel, Jun 23 2019

CROSSREFS

Cf. A050754.

Sequence in context: A039263 A344881 A039203 * A039117 A185024 A247915

Adjacent sequences:  A050743 A050744 A050745 * A050747 A050748 A050749

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Sep 15 1999

STATUS

approved

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Last modified September 27 15:44 EDT 2021. Contains 347691 sequences. (Running on oeis4.)