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 A121825 Primes of the form 4*k^2 + 3. 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 (list; graph; refs; listen; history; text; internal format)
 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. LINKS 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 Cf. A000040, A002496, A049423, A121326. Sequence in context: A160128 A051139 A049423 * A066237 A135741 A328159 Adjacent sequences:  A121822 A121823 A121824 * A121826 A121827 A121828 KEYWORD easy,nonn 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

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Last modified September 27 09:09 EDT 2020. Contains 337380 sequences. (Running on oeis4.)