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A154405
Primes of the form 20n^2+8n+1.
1
29, 97, 353, 541, 769, 1693, 2081, 4621, 8161, 9857, 13729, 14797, 17053, 19469, 24781, 26209, 32321, 35617, 42689, 48413, 54497, 65437, 72481, 77377, 85021, 87649, 95773, 98561, 125453, 141793, 148609, 152077, 166349, 177473, 185089
OFFSET
1,1
LINKS
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
Sequence in context: A044216 A044597 A138625 * A092373 A240954 A087641
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