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 A126424 Numbers n for which n^4-n-1 is prime. 17
 2, 4, 5, 6, 7, 9, 11, 13, 16, 20, 23, 26, 39, 40, 42, 44, 50, 53, 55, 57, 60, 61, 68, 71, 77, 79, 82, 92, 110, 111, 112, 123, 137, 139, 140, 147, 153, 154, 156, 169, 172, 174, 177, 183, 187, 189, 193, 198, 207, 214, 229, 230, 231, 239, 251, 258, 259, 272, 274, 279 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 MATHEMATICA a = {}; Do[If[PrimeQ[x^4 - x - 1], AppendTo[a, x]], {x, 1, 1000}]; a CROSSREFS Cf. A002327, A002328, A116581, A126420, A126421, A126422, A126423. Sequence in context: A242788 A026426 A026480 * A164317 A138620 A260820 Adjacent sequences:  A126421 A126422 A126423 * A126425 A126426 A126427 KEYWORD nonn AUTHOR Artur Jasinski, Dec 26 2006 STATUS approved

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Last modified February 25 08:48 EST 2020. Contains 332221 sequences. (Running on oeis4.)