A032967 Numbers with the property that all pairs of consecutive base-4 digits differ by more than 1.

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

Links

Table of n, a(n) for n=1..49.

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

Adjacent sequences: A032964 A032965 A032966 * A032968 A032969 A032970

Keyword

nonn,base

Author

Clark Kimberling

Status

approved