OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..10000
EXAMPLE
For n=1, a(1)=29; n=2, a(2)=97
MATHEMATICA
Select[Table[20n^2+8n+1, {n, 0, 600}], PrimeQ]
PROG
(Magma) [a: n in [0..200] | IsPrime(a) where a is 20*n^2+8*n+1];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jan 09 2009
EXTENSIONS
12701 removed, 32321 inserted, 18609 replaced by 148609 - R. J. Mathar, Feb 19 2009
Misleading formula removed - R. J. Mathar, Oct 18 2010
STATUS
approved