proposed

approved

editing

proposed

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

approved

editing

editing

approved

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

approved

editing

Clark Kimberling (ck6(AT)evansville.edu)

Clark Kimberling

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

nonn,base,new

nonn,base,new

Clark Kimberling, (ck6(AT)evansville.edu)

String 5,4 occurs in the base 10 representation of n, but not of n+1.

nonn,base,new

Clark Kimberling, ck6@cedar.(AT)evansville.edu

String 5,4 occurs in the base 10 representation of n, but not of n+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

1,1

nonn,base

Clark Kimberling, [email protected]

approved