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%I #15 Sep 08 2022 08:45:27
%S 3,7,19,67,103,199,487,787,1447,2503,2707,3847,4099,4903,5479,5779,
%T 8467,8839,11239,12547,14887,16903,17959,19603,21319,23719,24967,
%U 25603,29587,31687,47527,52903,58567,59539,61507,65539,75079,81799,88807,92419
%N Duplicate of A049423.
%C 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.
%F a(n) = 3 + (2*A097697(n))^2. - _R. J. Mathar_, Aug 07 2008
%o (Magma) [ a: n in [0..200] | IsPrime(a) where a is 4*n^2+3 ]; // _Vincenzo Librandi_, Dec 22 2010
%Y Cf. A000040, A002496, A049423, A121326.
%K dead
%O 1,1
%A _Jonathan Vos Post_, Aug 27 2006
%E Terms after 21319 added by _R. J. Mathar_, Aug 07 2008
%E 3 added by _Vincenzo Librandi_, Dec 22 2010
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