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A121825
Duplicate of A049423.
1
3, 7, 19, 67, 103, 199, 487, 787, 1447, 2503, 2707, 3847, 4099, 4903, 5479, 5779, 8467, 8839, 11239, 12547, 14887, 16903, 17959, 19603, 21319, 23719, 24967, 25603, 29587, 31687, 47527, 52903, 58567, 59539, 61507, 65539, 75079, 81799, 88807, 92419
OFFSET
1,1
COMMENTS
See also A121326 (Primes of the form 4*k^2 + 1); see also A049423 (Primes of the form k^2 + 3). For the primes of the form 4*k^2 + 3, the corresponding values of k are 1, 2, 4, 5, 7, 11, 14, 19, 25, 26, 31, 32, 35, 37, 38, 46, 47, 53, 56, 61, 65, 67, 70, 73.
FORMULA
a(n) = 3 + (2*A097697(n))^2. - R. J. Mathar, Aug 07 2008
PROG
(Magma) [ a: n in [0..200] | IsPrime(a) where a is 4*n^2+3 ]; // Vincenzo Librandi, Dec 22 2010
CROSSREFS
KEYWORD
dead
AUTHOR
Jonathan Vos Post, Aug 27 2006
EXTENSIONS
Terms after 21319 added by R. J. Mathar, Aug 07 2008
3 added by Vincenzo Librandi, Dec 22 2010
STATUS
approved