A044767 - OEIS

A044767

Numbers k such that string 5,4 occurs in the base 10 representation of k but not of k+1.

54, 154, 254, 354, 454, 549, 554, 654, 754, 854, 954, 1054, 1154, 1254, 1354, 1454, 1549, 1554, 1654, 1754, 1854, 1954, 2054, 2154, 2254, 2354, 2454, 2549, 2554, 2654, 2754, 2854, 2954, 3054, 3154, 3254, 3354, 3454, 3549

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {5, 4}]>0, 1, 0], {n, 4000}], {1, 0}][[;; , 1]] (* Harvey P. Dale, Feb 01 2026 *)

CROSSREFS

Sequence in context: A286836 A304172 A044386 * A250792 A044980 A248598

Adjacent sequences: A044764 A044765 A044766 * A044768 A044769 A044770

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved