A217077 Numbers n such that (n^41-1)/(n-1) is prime.

14, 53, 55, 58, 71, 76, 82, 211, 248, 271, 296, 316, 430, 433, 439, 472, 545, 553, 555, 596, 663, 677, 682, 746, 814, 832, 885, 926, 947, 959, 1048, 1121, 1146, 1175, 1207, 1300, 1302, 1390, 1404, 1445, 1466, 1541, 1650, 1699, 1702, 1706, 1756, 1757, 1782, 1902

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[2, 2000], PrimeQ[(#^41 - 1)/(# - 1)] &] (* T. D. Noe, Sep 26 2012 *)

Prog

(Magma) [n: n in [2..2000] |IsPrime((n^41 - 1) div (n - 1))]; // Vincenzo Librandi, Sep 28 2012
(PARI) is(n)=isprime((n^41-1)/(n-1)) \\ Charles R Greathouse IV, Feb 17 2017

Crossrefs

Cf. A002384, A049409, A100330, A162862, A217070-A217089.

Sequence in context: A125740 A332594 A338165 * A365199 A214659 A241354

Adjacent sequences: A217074 A217075 A217076 * A217078 A217079 A217080

Keyword

nonn,easy

Author

Tim Johannes Ohrtmann, Sep 26 2012

Extensions

More terms from T. D. Noe, Sep 26 2012

Status

approved