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A086337 Numbers n such that n, n-1 and n-2 have the same prime signature. 1
35, 87, 95, 143, 203, 215, 219, 303, 395, 447, 635, 699, 923, 1043, 1139, 1263, 1311, 1347, 1403, 1643, 1763, 1839, 1887, 1895, 1943, 1983, 2015, 2103, 2183, 2219, 2307, 2363, 2435, 2463, 2519, 2643, 2667, 2723, 2735, 3099, 3387, 3603, 3695, 3731, 3867 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..10000

MATHEMATICA

sig[n_] := If[n == 1, {}, Last /@ FactorInteger[n]]; Select[Range[3902], sig[#] == sig[# - 1] == sig[# - 2] &] (* Giovanni Resta, Aug 14 2017 *)

CROSSREFS

Cf. A083793.

Sequence in context: A119691 A220007 A115393 * A118631 A220041 A182755

Adjacent sequences:  A086334 A086335 A086336 * A086338 A086339 A086340

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 01 2003

STATUS

approved

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Last modified May 31 19:40 EDT 2020. Contains 334748 sequences. (Running on oeis4.)