A155702 Primes of the form 2n^2-9.
23, 41, 89, 191, 233, 383, 503, 569, 1049, 1559, 1913, 2039, 2441, 2729, 2879, 3191, 3863, 4409, 4793, 5399, 6263, 6719, 7433, 8969, 9239, 9791, 12473, 12791, 14783, 16553, 18041, 19991, 20393, 23753, 26903, 29759, 33791, 34313, 37529, 39191, 46199
Offset: 1
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..5000
Programs
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Magma
[a: n in [2..300] | IsPrime(a) where a is 2*n^2-9];
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Mathematica
Select[Table[2n^2-9,{n,2,800}],PrimeQ]
Extensions
Definition rewritten by Bruno Berselli, Dec 04 2011
Comments