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A046316
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Numbers of the form p*q*r where p,q,r are (not necessarily distinct) odd primes.
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23
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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
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listen;
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OFFSET
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1,1
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LINKS
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PROG
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(Haskell)
a046316 n = a046316_list !! (n-1)
a046316_list = filter ((== 3) . a001222) [1, 3 ..]
(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
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CROSSREFS
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A369979 sorted into ascending order.
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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