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A032967
Numbers with the property that all pairs of consecutive base-4 digits differ by more than 1.
0
1, 2, 3, 7, 8, 12, 13, 28, 29, 34, 35, 50, 51, 55, 114, 115, 119, 136, 140, 141, 200, 204, 205, 220, 221, 456, 460, 461, 476, 477, 546, 547, 562, 563, 567, 802, 803, 818, 819, 823, 882, 883, 887, 1826, 1827, 1842, 1843, 1847, 1906
OFFSET
1,2
MATHEMATICA
Select[Range[2000], Min[Abs[Differences[IntegerDigits[#, 4]]]]>1&] (* Harvey P. Dale, Nov 25 2018 *)
CROSSREFS
Sequence in context: A233998 A047221 A331078 * A111101 A281017 A281018
KEYWORD
nonn,base
STATUS
approved