A044101 Numbers n such that string 4,4 occurs in the base 5 representation of n but not of n-1.

24, 49, 74, 99, 120, 149, 174, 199, 224, 245, 274, 299, 324, 349, 370, 399, 424, 449, 474, 495, 524, 549, 574, 599, 649, 674, 699, 724, 745, 774, 799, 824, 849, 870, 899, 924, 949, 974, 995, 1024, 1049, 1074, 1099, 1120, 1149

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 5], {4, 4}]>0, 1, 0], {n, 1500}], {0, 1}][[;; , 2]] (* Harvey P. Dale, Feb 18 2025 *)

Crossrefs

Sequence in context: A023739 A031475 A045204 * A044482 A045294 A258366

Adjacent sequences: A044098 A044099 A044100 * A044102 A044103 A044104

Keyword

nonn,base

Author

Clark Kimberling

Status

approved