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A219278
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Numbers n such that ChebyshevT[16,n] is prime.
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4
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2, 13, 20, 21, 33, 74, 87, 88, 94, 104, 105, 127, 172, 182, 185, 188, 215, 224, 233, 240, 249, 258, 278, 281, 292, 293, 304, 329, 337, 365, 399, 416, 433, 440, 468, 471, 489, 502, 509, 529, 540, 573, 576, 583, 608, 612, 615, 622, 630, 631, 639, 685, 689, 707
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OFFSET
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1,1
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COMMENTS
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ChebyshevT[16,x] is the 16th Chebyshev polynomial of the first kind evaluated at x.
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LINKS
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MAPLE
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P:= unapply(orthopoly[T](16, x), x):
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MATHEMATICA
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lst={}; Do[If[PrimeQ[ChebyshevT [16, n]], AppendTo[lst, n]], {n, 10^3}]; lst
Select[Range[800], PrimeQ[ChebyshevT[16, #]]&] (* Harvey P. Dale, Jan 23 2016 *)
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PROG
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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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