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A176350 First of three consecutive numbers with at least one 3 in their prime signature. 5
6858, 22625, 28375, 40472, 48248, 49624, 58374, 59750, 94471, 102248, 103624, 107702, 112374, 122823, 129623, 133623, 136214, 136375, 153063, 164295, 187623, 190375, 197910, 199624, 210248, 211624, 220374, 221750, 238248, 246616, 260874, 264248, 275750, 280231, 298375, 300806, 312471, 329623, 336824, 346086, 349623, 352375, 356375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

6858=2*3^3*127,6859=19^3,6860=2^2*5*7^3,..

MATHEMATICA

f[n_]:=MemberQ[Last/@FactorInteger[n], 3]; Select[Range[9!], f[#]&&f[#+1]&&f[#+2]&]

SequencePosition[Table[If[MemberQ[FactorInteger[n][[All, 2]], 3], 1, 0], {n, 360000}], {1, 1, 1}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 09 2019 *)

CROSSREFS

Cf. A000578, A001235, A176297, A176313.

Sequence in context: A212076 A252565 A066878 * A114772 A013811 A013892

Adjacent sequences:  A176347 A176348 A176349 * A176351 A176352 A176353

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Dec 07 2010

EXTENSIONS

Edited by Matthew Vandermast, Dec 09 2010

STATUS

approved

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Last modified September 22 14:32 EDT 2021. Contains 347607 sequences. (Running on oeis4.)