A188661 Primes of the form (2^n+3)^2-8.
17, 41, 113, 353, 1217, 4481, 67073, 1054721, 4206593, 16801793, 274881052673, 18014399314788353, 72057595648540673, 18446744099479355393, 4722366483281962074113, 79228162514266026443404214273
Offset: 1
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..25
- Daniel Shanks, Gauss's ternary form reduction and the 2-Sylow subgroup, Math. Comp. 25 (1971), 837-853.
Programs
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Magma
[a: n in [0..100] | IsPrime(a) where a is (2^n+3)^2-8]; // Vincenzo Librandi, Mar 21 2013
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Mathematica
Select[(2^Range[0,50]+3)^2-8,PrimeQ] (* Harvey P. Dale, Apr 16 2011 *) Select[Table[(2^n + 3)^2 - 8, {n, 80}], PrimeQ] (* Vincenzo Librandi, Mar 21 2013 *)
Comments