A043125 Numbers k such that 2 and 3 occur juxtaposed in the base-6 representation of k but not of k-1.

15, 20, 51, 56, 87, 90, 120, 128, 159, 164, 195, 200, 231, 236, 267, 272, 303, 306, 336, 344, 375, 380, 411, 416, 447, 452, 483, 488, 519, 522, 540, 591, 596, 627, 632, 663, 668, 699, 704, 720, 768, 776, 807, 812, 843, 848, 879

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 6], {2, 3}]>0 || SequenceCount[ IntegerDigits[n, 6], {3, 2}]>0, 1, 0], {n, 900}], {0, 1}][[;; , 2]] (* Harvey P. Dale, Feb 25 2023 *)

Crossrefs

Cf. A007092.

Sequence in context: A105506 A120625 A038352 * A043905 A072310 A166645

Adjacent sequences: A043122 A043123 A043124 * A043126 A043127 A043128

Keyword

nonn,base

Author

Clark Kimberling

Status

approved