A244388 Numbers k such that 1 + k + k^3 + k^5 + k^7 + k^9 + ... + k^49 is prime.

4, 6, 60, 208, 250, 282, 294, 384, 400, 502, 760, 942, 1032, 1050, 1390, 1560, 2028, 2038, 2124, 2182, 3196, 4246, 4426, 4522, 4932, 4986, 5020, 5092, 5830, 6216, 6634, 6868, 7128, 7156, 7182, 7240, 7356, 7428, 7642, 7858, 8188, 8454, 8500, 8670, 9130

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..490

Mathematica

Select[Range[10000], PrimeQ[Total[#^Range[1, 49, 2]] + 1] &]

Prog

(Magma) [n: n in [0..10000] | IsPrime(s) where s is 1+&+[n^i: i in [1..49 by 2]]];

Crossrefs

Cf. similar sequences listed in A244376.

Sequence in context: A351733 A089630 A058162 * A132929 A154668 A363861

Adjacent sequences: A244385 A244386 A244387 * A244389 A244390 A244391

Keyword

nonn,easy

Author

Vincenzo Librandi, Jun 27 2014

Status

approved