A043242 Numbers k such that 3 and 6 occur juxtaposed in the base-10 representation of k but not of k-1.

36, 63, 136, 163, 236, 263, 336, 360, 436, 463, 536, 563, 630, 663, 736, 763, 836, 863, 936, 963, 1036, 1063, 1136, 1163, 1236, 1263, 1336, 1360, 1436, 1463, 1536, 1563, 1630, 1663, 1736, 1763, 1836, 1863, 1936, 1963, 2036

Offset

1,1

Links

Table of n, a(n) for n=1..41.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {3, 6}]>0 || SequenceCount[ IntegerDigits[n], {6, 3}]>0, 1, 0], {n, 2100}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 18 2019 *)

Crossrefs

Sequence in context: A287862 A066505 A039419 * A044022 A337862 A082295

Adjacent sequences: A043239 A043240 A043241 * A043243 A043244 A043245

Keyword

nonn,base

Author

Clark Kimberling

Status

approved