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A032991 If d,e are consecutive digits of n in base 9, then |d-e|>=4. 0
1, 2, 3, 4, 5, 6, 7, 8, 14, 15, 16, 17, 24, 25, 26, 34, 35, 36, 44, 45, 46, 54, 55, 56, 63, 64, 65, 66, 72, 73, 74, 75, 76, 126, 127, 135, 136, 137, 144, 145, 146, 147, 153, 154, 155, 156, 157, 216, 217, 218, 225, 226, 227, 228, 234, 235 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Sequence in context: A162572 A250476 A222260 * A032870 A023763 A032904

Adjacent sequences:  A032988 A032989 A032990 * A032992 A032993 A032994

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 29 10:03 EST 2021. Contains 349416 sequences. (Running on oeis4.)