A043893 Numbers k such that 2 and 3 occur juxtaposed in the base-5 representation of k but not of k+1.

13, 17, 38, 42, 63, 69, 89, 92, 113, 117, 138, 142, 163, 167, 188, 194, 214, 217, 238, 242, 263, 267, 288, 292, 313, 319, 349, 363, 367, 388, 392, 413, 417, 449, 464, 467, 488, 492, 513, 517, 538, 542, 563, 569, 589, 592, 613

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 5], {2, 3}]>0 || SequenceCount[IntegerDigits[n, 5], {3, 2}]>0, 1, 0], {n, 700}], {1, 0}] [[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 20 2021 *)

Crossrefs

Cf. A007091.

Sequence in context: A039290 A045267 A043113 * A279392 A239901 A068497

Adjacent sequences: A043890 A043891 A043892 * A043894 A043895 A043896

Keyword

nonn,base

Author

Clark Kimberling

Status

approved