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A057590
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Numbers of the form n*(n^3+-1)/2.
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0
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0, 1, 7, 9, 39, 42, 126, 130, 310, 315, 645, 651, 1197, 1204, 2044, 2052, 3276, 3285, 4995, 5005, 7315, 7326, 10362, 10374, 14274, 14287, 19201, 19215, 25305, 25320, 32760, 32776, 41752, 41769, 52479, 52497, 65151, 65170, 79990, 80010
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| This sequence is also the integers n such that x^6 - 8*n*x^4 - 1 is reducible over the integers, and, for n>0 such that the factors are two irreducible cubics. [From James Buddenhagen (jbuddenh(AT)gmail.com), May 29 2010]
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CROSSREFS
| Sequence in context: A189974 A083203 A082536 * A140787 A032695 A007449
Adjacent sequences: A057587 A057588 A057589 * A057591 A057592 A057593
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 05 2000
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