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A111068
Numbers k such that 3*k^2 + 16 is prime.
4
1, 3, 7, 11, 13, 15, 17, 27, 29, 35, 41, 43, 45, 49, 53, 55, 59, 63, 71, 81, 91, 95, 105, 111, 119, 123, 129, 141, 143, 155, 171, 181, 183, 197, 199, 207, 209, 217, 221, 237, 241, 249, 251, 253, 263, 277, 283, 297, 309, 315, 323, 325, 337, 349, 357, 363, 365, 371
OFFSET
1,2
LINKS
EXAMPLE
If k=95 then 3*k^2 + 16 = 27091 (prime).
MAPLE
A111068:=n->`if`(isprime(3*n^2+16), n, NULL): seq(A111068(n), n=1..800); # Wesley Ivan Hurt, Jan 13 2017
MATHEMATICA
Select[Range[0, 400], PrimeQ[3*#^2 + 16] &] (* Stefan Steinerberger, Mar 03 2006 *)
PROG
(PARI) is(n)=isprime(3*n^2+16) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
Cf. A111069.
Sequence in context: A062823 A031466 A045062 * A322430 A337705 A102213
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Oct 08 2005
EXTENSIONS
More terms from Stefan Steinerberger, Mar 03 2006
STATUS
approved