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A052292
Primes of form 4*p^2 + 1, p prime.
5
17, 37, 101, 197, 677, 5477, 8837, 17957, 21317, 42437, 98597, 106277, 148997, 217157, 401957, 454277, 1196837, 1378277, 1674437, 1705637, 1833317, 1865957, 2390117, 2735717, 3118757, 3147077, 3587237, 3865157, 4104677, 4519877
OFFSET
1,1
FORMULA
q = 4p^2 + 1 primes
EXAMPLE
a(10) = 42437 = 4*103*103 + 1, where 103 is the generating prime.
MATHEMATICA
Select[Prime[Range[350000]], PrimeQ[Sqrt[(#-1)/4]]&] (* Harvey P. Dale, Feb 20 2011 *)
CROSSREFS
Cf. A052291.
Sequence in context: A350096 A269240 A060429 * A154301 A057185 A157467
KEYWORD
nonn
AUTHOR
Labos Elemer, Feb 08 2000
STATUS
approved