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A032970
Numbers with the property that all pairs of consecutive base-7 digits differ by more than 1.
0
1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 18, 19, 20, 21, 22, 26, 27, 28, 29, 30, 34, 35, 36, 37, 38, 42, 43, 44, 45, 46, 70, 71, 75, 76, 77, 78, 79, 83, 84, 85, 86, 87, 91, 92, 93, 94, 95, 100, 101, 102, 103, 104, 126, 127, 128, 132, 133, 134
OFFSET
1,2
MATHEMATICA
Select[Range[200], Min[Abs[Differences[IntegerDigits[#, 7]]]]>1&] (* Harvey P. Dale, May 04 2021 *)
CROSSREFS
Sequence in context: A285469 A302706 A047423 * A137691 A215726 A158520
KEYWORD
nonn,base
STATUS
approved