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 A046389 Products of exactly three distinct odd primes. 23
 105, 165, 195, 231, 255, 273, 285, 345, 357, 385, 399, 429, 435, 455, 465, 483, 555, 561, 595, 609, 615, 627, 645, 651, 663, 665, 705, 715, 741, 759, 777, 795, 805, 861, 885, 897, 903, 915, 935, 957, 969, 987, 1001, 1005, 1015, 1023, 1045, 1065, 1085 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The old name was "Odd numbers with exactly 3 distinct prime factors", which is slightly ambiguous, since it might be interpreted to include 315 = 3^2*5*7. Cf. A278569. - N. J. A. Sloane, Nov 27 2016 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 MATHEMATICA f[n_] := OddQ[n] && Last/@FactorInteger[n]=={1, 1, 1}; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 2000}]; lst (* Vladimir Joseph Stephan Orlovsky, Nov 23 2009 *) PROG (PARI) list(lim)=my(v=List(), t); forprime(p=3, lim^(1/3), forprime(q=p+1, sqrt(lim\p), t=p*q; forprime(r=q+1, lim\t, listput(v, t*r)))); vecsort(Vec(v)) \\ Charles R Greathouse IV, Jul 26 2011 CROSSREFS Cf. A046316, A046405, A007304, A278569. Sequence in context: A013590 A216918 A278569 * A154430 A118678 A152940 Adjacent sequences: A046386 A046387 A046388 * A046390 A046391 A046392 KEYWORD nonn AUTHOR Patrick De Geest, Jun 15 1998 EXTENSIONS Name clarified by N. J. A. Sloane, Nov 27 2016 STATUS approved

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Last modified March 2 16:48 EST 2024. Contains 370497 sequences. (Running on oeis4.)