OFFSET
1,1
LINKS
T. D. Noe, Table of n, a(n) for n = 1..10000
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
KEYWORD
nonn
AUTHOR
Labos Elemer, Feb 08 2000
STATUS
approved