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Search: id:A085987
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| A085987 |
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Product of exactly four primes, three of which are distinct. |
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+0
2
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| 60, 84, 90, 126, 132, 140, 150, 156, 198, 204, 220, 228, 234, 260, 276, 294, 306, 308, 315, 340, 342, 348, 350, 364, 372, 380, 414, 444, 460, 476, 490, 492, 495, 516, 522, 525, 532, 550, 558, 564, 572, 580, 585, 620, 636, 644, 650, 666, 693, 708, 726
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A014613 is completely determined by A030514, A065036, A085986, A085987 and A046386 since p(4) = 5. (cf. A000041). More generally, the first term of sequences which completely determine the k-almost primes can be found in A036035 (a resorted version of A025487).
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EXAMPLE
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a(1) = 60 since 60 = 2*2*3*5 and has three distinct prime factors.
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CROSSREFS
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Cf. A000007, A000040, A001248, A006881, A030078, A054753, A007304, A050997, A046387, A036035.
Cf. A086974.
Sequence in context: A067207 A123712 A009129 this_sequence A086974 A099831 A138604
Adjacent sequences: A085984 A085985 A085986 this_sequence A085988 A085989 A085990
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KEYWORD
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nonn
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AUTHOR
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Alford Arnold (Alford1940(AT)aol.com), Jul 08 2003
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EXTENSIONS
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More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jul 25 2003
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