A114269 Numbers k such that k^2 + 6 is prime.

1, 5, 11, 19, 25, 31, 35, 61, 65, 79, 89, 91, 109, 131, 145, 151, 175, 185, 199, 221, 269, 329, 331, 355, 401, 431, 445, 481, 485, 511, 515, 529, 539, 569, 595, 605, 611, 649, 695, 709, 731, 775, 779, 859, 889, 905, 929, 941, 949, 955, 971, 985, 991

Offset: 1

Author

Zak Seidov, Nov 19 2005

Keywords

• nonn

Links

• G. C. Greubel, Table of n, a(n) for n = 1..1000

Crossrefs

Other sequences of the type "Numbers k such that k^2 + i is prime": A005574 (i=1), A067201 (i=2), A049422 (i=3), A007591 (i=4), A078402 (i=5), A114270 (i=7), A114271 (i=8), A114272 (i=9), A114273 (i=10), A114274 (i=11), A114275 (i=12).

Programs

Mathematica

With[{k=6}, Select[Range[1000], PrimeQ[ #^2+k]&]]

PARI

is(n)=isprime(n^2+6) \\ Charles R Greathouse IV, Jan 21 2015