A104110 Nonnegative numbers k such that k^2 + 42 is prime.
1, 5, 11, 13, 17, 23, 29, 41, 47, 53, 55, 89, 95, 101, 103, 107, 109, 115, 121, 125, 131, 145, 157, 169, 179, 181, 185, 191, 197, 211, 221, 233, 239, 247, 271, 277, 289, 299, 307, 311, 313, 325, 349, 355, 359, 361, 367, 403, 421, 425, 433, 443, 457, 467, 493
Offset: 1
Keywords
Links
- Harvey P. Dale, Table of n, a(n) for n = 1..1000
Programs
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Magma
[ n: n in [0..500] | IsPrime(n^2 + 42) ] // Vincenzo Librandi, Nov 13 2010
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Mathematica
Select[Range[1,500,2],PrimeQ[#^2+42]&] (* Harvey P. Dale, May 25 2017 *)
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PARI
for(i=0,422,if(isprime(i^2+42),print1(i ",")))