A217129 Numbers n such that n^4 + 1 is not prime.

3, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 21, 22, 23, 25, 26, 27, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 79, 81, 83

Offset

1,1

Links

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

Mathematica

Select[Range[100], ! PrimeQ[#^4 + 1] &]

Prog

(Magma) [n: n in [1..100] |not IsPrime(n^4+1)];

Crossrefs

Cf. A000068, A037896.

Sequence in context: A137203 A102890 A008520 * A336340 A100318 A167707

Adjacent sequences: A217126 A217127 A217128 * A217130 A217131 A217132

Keyword

nonn,easy

Author

Vincenzo Librandi, Sep 27 2012

Status

approved