A044301 - OEIS

A044301

Numbers n such that string 5,5 occurs in the base 9 representation of n but not of n-1.

50, 131, 212, 293, 374, 450, 536, 617, 698, 779, 860, 941, 1022, 1103, 1179, 1265, 1346, 1427, 1508, 1589, 1670, 1751, 1832, 1908, 1994, 2075, 2156, 2237, 2318, 2399, 2480, 2561, 2637, 2723, 2804, 2885, 2966, 3047, 3128

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OFFSET

1,1

LINKS

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

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {5, 5}]>0, 1, 0], {n, 3200}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 18 2019 *)

CROSSREFS

Sequence in context: A045181 A093194 A043474 * A044682 A200881 A235942

Adjacent sequences: A044298 A044299 A044300 * A044302 A044303 A044304

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved