A033074 Numbers with the property that all pairs of consecutive base-9 digits differ by 1.

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69, 71, 79, 82, 100, 102, 171, 173, 191, 193, 262, 264, 282, 284, 353, 355, 373, 375, 444, 446, 464, 466, 535, 537, 555, 557, 626, 628, 646, 717, 719, 738, 740, 900

Offset

1,2

Links

Table of n, a(n) for n=1..54.

Mathematica

Join[Range[8], Select[Range[1000], Union[Abs[Differences[IntegerDigits[ #, 9]]]]=={1}&]] (* Harvey P. Dale, Dec 14 2011 *)

Crossrefs

Sequence in context: A147591 A271954 A330969 * A067451 A344749 A247753

Adjacent sequences: A033071 A033072 A033073 * A033075 A033076 A033077

Keyword

nonn,base

Author

Clark Kimberling

Status

approved