A044100 - OEIS

A044100

Numbers n such that string 4,3 occurs in the base 5 representation of n but not of n-1.

23, 48, 73, 98, 115, 123, 148, 173, 198, 223, 240, 248, 273, 298, 323, 348, 365, 373, 398, 423, 448, 473, 490, 498, 523, 548, 573, 575, 615, 623, 648, 673, 698, 723, 740, 748, 773, 798, 823, 848, 865, 873, 898, 923, 948, 973

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 5], {4, 3}]>0, 1, 0], {n, 1000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 16 2017 *)

CROSSREFS

Sequence in context: A333115 A042056 A087807 * A044481 A132764 A029493

Adjacent sequences: A044097 A044098 A044099 * A044101 A044102 A044103

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved