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URL: https://oeis.org/A033086

⇱ A033086 - OEIS

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A033086
Numbers in which all pairs of consecutive base-8 digits differ by 2.
1
1, 2, 3, 4, 5, 6, 7, 11, 16, 20, 25, 29, 34, 38, 43, 47, 52, 61, 89, 93, 130, 162, 166, 203, 235, 239, 272, 276, 308, 345, 349, 381, 418, 422, 491, 495, 715, 747, 751, 1040, 1044, 1296, 1300, 1332, 1625, 1629, 1881, 1885, 1917, 2178
OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..421 (all terms up to 10 million)
EXAMPLE
Numbers 1 through 7 are members because they have no pairs of consecutive base 8 digits, and "the empty set has every property". - N. J. A. Sloane, Oct 03 2020
MATHEMATICA
Join[Range[7], Select[Range[2200], Union[Abs[Differences[ IntegerDigits[ #, 8]]]]=={2}&]] (* Harvey P. Dale, Oct 03 2020 *)
CROSSREFS
Sequence in context: A174323 A103539 A174821 * A059768 A271835 A118599
KEYWORD
nonn,base
STATUS
approved