OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[100], ! PrimeQ[(2 #)^4 + 1] &]
PROG
(Magma) [n: n in [1..100] | not IsPrime((2*n)^4+1)];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Sep 27 2012
STATUS
approved