A032990 - OEIS

A032990

If d,e are consecutive digits of n in base 8, then |d-e|>=4.

1, 2, 3, 4, 5, 6, 7, 13, 14, 15, 22, 23, 31, 32, 40, 41, 48, 49, 50, 56, 57, 58, 59, 104, 105, 112, 113, 114, 120, 121, 122, 123, 176, 177, 178, 184, 185, 186, 187, 248, 249, 250, 251, 260, 261, 262, 263, 324, 325, 326, 327, 333, 334

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OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[500], Min[Abs[Differences[IntegerDigits[#, 8]]]]>3&] (* Harvey P. Dale, Aug 09 2014 *)

CROSSREFS

Sequence in context: A165305 A125745 A265124 * A060810 A319723 A271377

Adjacent sequences: A032987 A032988 A032989 * A032991 A032992 A032993

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved