A044098 Numbers k such that the string 4,1 occurs in the base 5 representation of k but not of k-1.

21, 46, 71, 96, 105, 121, 146, 171, 196, 221, 230, 246, 271, 296, 321, 346, 355, 371, 396, 421, 446, 471, 480, 496, 521, 525, 571, 596, 605, 621, 646, 671, 696, 721, 730, 746, 771, 796, 821, 846, 855, 871, 896, 921, 946, 971

Offset

1,1

Links

Table of n, a(n) for n=1..46.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 5], {4, 1}]>0, 1, 0], {n, 1000}], {0, 1}][[All, 2]] (* Harvey P. Dale, Feb 02 2023 *)

Crossrefs

Sequence in context: A102603 A147222 A199767 * A044479 A139581 A250777

Adjacent sequences: A044095 A044096 A044097 * A044099 A044100 A044101

Keyword

nonn,base

Author

Clark Kimberling

Status

approved