A044337 Numbers n such that string 0,5 occurs in the base 10 representation of n but not of n-1.

105, 205, 305, 405, 505, 605, 705, 805, 905, 1005, 1050, 1105, 1205, 1305, 1405, 1505, 1605, 1705, 1805, 1905, 2005, 2050, 2105, 2205, 2305, 2405, 2505, 2605, 2705, 2805, 2905, 3005, 3050, 3105, 3205, 3305, 3405, 3505

Offset

1,1

Links

Table of n, a(n) for n=1..38.

Mathematica

Flatten[Position[Partition[Table[If[MemberQ[Partition[IntegerDigits[n], 2, 1], {0, 5}], 1, 0], {n, 3600}], 2, 1], {0, 1}]]+1 (* Harvey P. Dale, Mar 23 2015 *)
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {0, 5}]>0, 1, 0], {n, 4000}], {0, 1}][[All, 2]] (* Harvey P. Dale, Dec 24 2022 *)

Crossrefs

Sequence in context: A167629 A326141 A347881 * A044718 A239827 A273521

Adjacent sequences: A044334 A044335 A044336 * A044338 A044339 A044340

Keyword

nonn,base

Author

Clark Kimberling

Status

approved