|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
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
|
|
|
STATUS
|
approved
|
|
|
|