A044122 - OEIS

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A044122

Numbers n such that string 3,2 occurs in the base 6 representation of n but not of n-1.

20, 56, 92, 120, 128, 164, 200, 236, 272, 308, 336, 344, 380, 416, 452, 488, 524, 552, 560, 596, 632, 668, 704, 720, 768, 776, 812, 848, 884, 920, 956, 984, 992, 1028, 1064, 1100, 1136, 1172, 1200, 1208, 1244, 1280, 1316, 1352, 1388, 1416, 1424, 1460, 1496

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

OFFSET

1,1

LINKS

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

MATHEMATICA

f[n_] := Length[StringPosition[ToString[FromDigits[IntegerDigits[n, 6]]], "32", 1]]; Select[Table[n, {n, 10000}], f[#] > 0 && f[# - 1] == 0 &] (* Vladimir Joseph Stephan Orlovsky, Jul 20 2011 *)

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 6], {3, 2}]>0, 1, 0], {n, 1500}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 23 2020 *)

CROSSREFS

Sequence in context: A316935 A123456 A144521 * A044503 A344072 A109806

Adjacent sequences: A044119 A044120 A044121 * A044123 A044124 A044125

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved