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Search: id:A117318
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| A117318 |
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Numbers n such that Phi(n,x) is a flat cyclotomic polynomial of order four. |
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+0
4
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| 431985, 757335, 865365, 1134915, 1296885, 1297815, 1675365, 1729335, 1891815, 2161785, 2162715, 2595165, 2648715, 2649585, 3027165, 3028035, 3132015, 3133785, 3347985, 3405615, 3565785, 3784065, 3891585, 4698465, 4920285
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OFFSET
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1,1
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COMMENT
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A flat polynomial is defined to be a polynomial whose coefficients are -1, 0, or 1. Order four means that n is the product of four odd primes p<q<r<s.
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CROSSREFS
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Cf. A117223 (third-order flat cyclotomic polynomials).
Sequence in context: A130022 A003828 A051595 this_sequence A085092 A117151 A134960
Adjacent sequences: A117315 A117316 A117317 this_sequence A117319 A117320 A117321
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe (noe(AT)sspectra.com), Mar 07 2006
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