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A250178
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Numbers k such that Phi_22(k) is prime, where Phi is the cyclotomic polynomial.
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19
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2, 6, 12, 13, 23, 24, 26, 35, 62, 69, 91, 105, 147, 160, 163, 183, 185, 193, 229, 232, 233, 236, 248, 262, 269, 280, 294, 303, 315, 330, 376, 394, 426, 430, 440, 464, 469, 491, 492, 508, 537, 625, 629, 647, 653, 666, 752, 772, 775, 786, 788, 832, 840, 852, 854, 855, 859, 905, 922, 972, 993, 998
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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a250178[n_] := Select[Range[n], PrimeQ@Cyclotomic[22, #] &]; a250178[1000] (* Michael De Vlieger, Dec 25 2014 *)
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PROG
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(PARI) isok(n) = isprime(polcyclo(22, n)); \\ Michel Marcus, Sep 29 2015
(Magma) [n: n in [1..1000]| IsPrime((n^11+1) div (n+1))]; // Vincenzo Librandi, May 21 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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