A050746 Numbers k such that the decimal expansion of k^7 contains no pair of consecutive equal digits.

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

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 A359913

Adjacent sequences: A050743 A050744 A050745 * A050747 A050748 A050749

Keyword

nonn,base

Author

Patrick De Geest, Sep 15 1999

Status

approved