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A033075
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Numbers n with property that all pairs of consecutive base 10 digits differ by 1.
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10
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 21, 23, 32, 34, 43, 45, 54, 56, 65, 67, 76, 78, 87, 89, 98, 101, 121, 123, 210, 212, 232, 234, 321, 323, 343, 345, 432, 434, 454, 456, 543, 545, 565, 567, 654, 656, 676, 678, 765, 767, 787, 789, 876
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Number of n-digit terms: 9, 17, 32, 61, 116, 222, 424 (= A090994).
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MATHEMATICA
| Join[Range[9], Select[Range[2000], Union[Abs[Differences[IntegerDigits[#]]]]=={1}&]] (* From Harvey P. Dale, Dec 28 2011 *)
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CROSSREFS
| Cf. A090994.
Sequence in context: A085133 A110806 A180468 * A132577 A044960 A044822
Adjacent sequences: A033072 A033073 A033074 * A033076 A033077 A033078
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KEYWORD
| nonn,base
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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