A032976 Numbers with the property that all pairs of consecutive base-5 digits differ by 0 or 1.

1, 2, 3, 4, 5, 6, 7, 11, 12, 13, 17, 18, 19, 23, 24, 25, 26, 30, 31, 32, 36, 37, 38, 55, 56, 57, 61, 62, 63, 67, 68, 69, 86, 87, 88, 92, 93, 94, 98, 99, 117, 118, 119, 123, 124, 125, 126, 130, 131, 132, 150, 151, 155, 156, 157, 161, 162, 163

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Links

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

Crossrefs

Cf. A007091.

Programs

Maple

filter:= proc(n) local L,S;
  L:= convert(n,base,5);
  S:= convert(L[2..-1] - L[1..-2],set);
  max(S)<=1 and min(S)>=-1
end proc:
select(filter, [$1..1000]); # Robert Israel, Nov 16 2016