A044358 Numbers n such that string 2,6 occurs in the base 10 representation of n but not of n-1.

26, 126, 226, 260, 326, 426, 526, 626, 726, 826, 926, 1026, 1126, 1226, 1260, 1326, 1426, 1526, 1626, 1726, 1826, 1926, 2026, 2126, 2226, 2260, 2326, 2426, 2526, 2600, 2726, 2826, 2926, 3026, 3126, 3226, 3260, 3326, 3426

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Mathematica

Select[Range[4000], MemberQ[Partition[IntegerDigits[#], 2, 1], {2, 6}] && !MemberQ[Partition[IntegerDigits[#-1], 2, 1], {2, 6}]&] (* Harvey P. Dale, Mar 20 2012 *)
SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {2, 6}]>0, 1, 0], {n, 3500}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 03 2021 *)

Crossrefs

Sequence in context: A124954 A126413 A246032 * A044739 A304834 A304169

Adjacent sequences: A044355 A044356 A044357 * A044359 A044360 A044361

Keyword

nonn,base

Author

Clark Kimberling

Status

approved