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A046316 Odd numbers divisible by exactly 3 primes (counted with multiplicity). 8
27, 45, 63, 75, 99, 105, 117, 125, 147, 153, 165, 171, 175, 195, 207, 231, 245, 255, 261, 273, 275, 279, 285, 325, 333, 343, 345, 357, 363, 369, 385, 387, 399, 423, 425, 429, 435, 455, 465, 475, 477, 483, 507, 531, 539, 549, 555, 561, 575, 595, 603, 605 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a046316 n = a046316_list !! (n-1)

a046316_list = filter ((== 3) . a001222) [1, 3 ..]

-- Reinhard Zumkeller, May 05 2015

(PARI) list(lim)=my(v=List(), pq); forprime(p=3, lim\9, forprime(q=3, min(lim\3\p, p), pq=p*q; forprime(r=3, lim\pq, listput(v, pq*r)))); Set(v) \\ Charles R Greathouse IV, Aug 23 2017

CROSSREFS

Subsequence of A014612 and of A046340.

Cf. A255646 (final digits).

Sequence in context: A259504 A121614 A046340 * A046373 A228057 A113481

Adjacent sequences:  A046313 A046314 A046315 * A046317 A046318 A046319

KEYWORD

nonn,easy

AUTHOR

Patrick De Geest, Jun 15 1998.

STATUS

approved

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Last modified December 15 03:08 EST 2017. Contains 296020 sequences.