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 A258356 Numbers n such that cyclotomic polynomial value Phi(10,n!) is prime. 0
 2, 36, 101, 107, 267, 316 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All values except 2 are probable primes. a(7) > 7560. That is, numbers n such that n! belongs to A246392. - Michel Marcus, May 30 2015 LINKS EXAMPLE 2 is in the sequence because Phi(10,2!) = 1 - 2 + 2^2 - 2^3 + 2^4 = 11 is prime. MATHEMATICA Select[Range[0, 7560], PrimeQ[Cyclotomic[10, #!]] &] CROSSREFS Cf. A002981, A002982, A046029, A200906. Sequence in context: A187298 A069067 A278930 * A145450 A196558 A187509 Adjacent sequences:  A258353 A258354 A258355 * A258357 A258358 A258359 KEYWORD nonn,more AUTHOR Robert Price, May 27 2015 STATUS approved

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Last modified April 11 15:49 EDT 2021. Contains 342886 sequences. (Running on oeis4.)