A033068 - OEIS

A033068

Numbers with the property that all pairs of consecutive base-3 digits differ by 1.

1, 2, 3, 5, 7, 10, 16, 21, 23, 30, 32, 48, 50, 64, 70, 91, 97, 145, 151, 192, 194, 210, 212, 273, 275, 291, 293, 435, 437, 453, 455, 577, 583, 631, 637, 820, 826, 874, 880, 1306, 1312, 1360, 1366, 1731, 1733, 1749, 1751, 1893, 1895, 1911, 1913, 2460, 2462, 2478

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

Join[Range[2], Select[Range[2000], Union[Abs[Differences[IntegerDigits[#, 3]]]]=={1}&]] (* Harvey P. Dale, Dec 28 2011 *)

CROSSREFS

Cf. A007089.

Sequence in context: A286227 A134792 A300795 * A234368 A052011 A278706

Adjacent sequences: A033065 A033066 A033067 * A033069 A033070 A033071

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved