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A028883
Primes of form n^2 - 7.
4
2, 29, 137, 317, 569, 1289, 2297, 2909, 3593, 4349, 8093, 9209, 11657, 17417, 19037, 24329, 26237, 30269, 34589, 36857, 41609, 46649, 49277, 51977, 57593, 60509, 72893, 93629, 101117, 108893, 129593, 133949, 147449, 152093, 166457, 191837, 202493, 219017, 224669
OFFSET
1,1
COMMENTS
Subsequence of primes of A028881. - Michel Marcus, Apr 11 2015
MAPLE
A028883:=n->`if`(isprime(n^2-7), n^2-7, NULL): seq(A028883(n), n=1..500); # Wesley Ivan Hurt, Apr 11 2015
MATHEMATICA
Select[Range[3, 410]^2 - 7, PrimeQ] (* Harvey P. Dale, Sep 20 2011 *)
PROG
(Magma) [a: n in [3..500] | IsPrime(a) where a is n^2-7]; // Vincenzo Librandi, Dec 01 2011
(PARI) lista(nn) = forprime (n=1, nn, if (issquare(n+7), print1(n, ", "))) \\ Michel Marcus, Apr 11 2015
CROSSREFS
Sequence in context: A062618 A128842 A308899 * A024200 A137625 A132412
KEYWORD
nonn,easy
EXTENSIONS
More terms from Michel Marcus, Apr 11 2015
STATUS
approved