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A119956 Numbers n such that n^3+1=p*q*r where p,q,r are distinct primes. 3
9, 10, 12, 13, 21, 25, 30, 34, 36, 40, 46, 52, 66, 76, 81, 90, 96, 118, 126, 130, 132, 142, 144, 154, 165, 172, 177, 180, 193, 196, 198, 204, 216, 226, 228, 238, 240, 246, 250, 256, 262, 268, 273, 282, 294, 312, 333, 336, 345, 346, 366, 370, 372, 378, 393, 400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A115403 is a supersequence not requiring that p,q,r are distinct.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

9^3+1=2*5*73 a product of 3 distinct primes, so 9 is in the sequence.

MATHEMATICA

Select[Range[400], Last/@FactorInteger[#^3 + 1] == {1, 1, 1}&] (* Vincenzo Librandi, Sep 15 2016 *)

CROSSREFS

Cf. A115403.

Sequence in context: A202706 A104627 A188057 * A059102 A295743 A214602

Adjacent sequences:  A119953 A119954 A119955 * A119957 A119958 A119959

KEYWORD

nonn

AUTHOR

James R. Buddenhagen, Aug 02 2006

STATUS

approved

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Last modified September 22 02:48 EDT 2021. Contains 347605 sequences. (Running on oeis4.)