A032974 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A032974

Numbers with the property that all pairs of consecutive base-3 digits differ by 0 or 1.

1, 2, 3, 4, 5, 7, 8, 9, 10, 12, 13, 14, 16, 17, 21, 22, 23, 25, 26, 27, 28, 30, 31, 32, 36, 37, 39, 40, 41, 43, 44, 48, 49, 50, 52, 53, 63, 64, 66, 67, 68, 70, 71, 75, 76, 77, 79, 80, 81, 82, 84, 85, 86, 90, 91, 93, 94, 95, 97, 98, 108, 109, 111

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..63.

Index entries for 3-automatic sequences.

MATHEMATICA

Select[Range[120], Max[Abs[Differences[IntegerDigits[#, 3]]]]<2&] (* Harvey P. Dale, Nov 06 2016 *)

CROSSREFS

A122975 is a subsequence.

Cf. A007089.

Sequence in context: A080919 A267303 A267307 * A127565 A082186 A099849

Adjacent sequences: A032971 A032972 A032973 * A032975 A032976 A032977

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved