A043218 Numbers k such that 0 and 3 occur juxtaposed in the base-10 representation of k but not of k-1.

30, 103, 130, 203, 230, 300, 330, 403, 430, 503, 530, 603, 630, 703, 730, 803, 830, 903, 930, 1003, 1030, 1103, 1130, 1203, 1230, 1300, 1330, 1403, 1430, 1503, 1530, 1603, 1630, 1703, 1730, 1803, 1830, 1903, 1930, 2003, 2030

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {0, 3}]>0 || SequenceCount[IntegerDigits[n], {3, 0}]>0, 1, 0], {n, 2100}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Feb 16 2020 *)

Crossrefs

Sequence in context: A070114 A070132 A280911 * A039395 A043998 A101056

Adjacent sequences: A043215 A043216 A043217 * A043219 A043220 A043221

Keyword

nonn,base

Author

Clark Kimberling

Status

approved