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A111082 Numbers n such that 3*n^2 + 49 is prime. 1
2, 4, 6, 8, 10, 18, 20, 24, 30, 32, 34, 44, 46, 48, 50, 52, 58, 68, 72, 74, 76, 78, 80, 94, 96, 104, 106, 122, 128, 132, 134, 146, 148, 158, 162, 164, 172, 178, 186, 192, 200, 204, 208, 214, 226, 230, 232, 240, 254, 256, 258, 262, 268, 270, 276, 278, 286, 292, 296 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

If n=96 then (3*n^2) + 49 = 27697 (prime).

MATHEMATICA

Select[Range[300], PrimeQ[3#^2+49]&] (* Harvey P. Dale, Sep 04 2019 *)

PROG

(MAGMA) [n: n in [0..300] | IsPrime(3*n^2+49)]; - Vincenzo Librandi, Nov 13 2010

(PARI) is(n)=isprime(3*n^2+49) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A111068, A111069.

Sequence in context: A088008 A067720 A078106 * A100433 A254343 A157006

Adjacent sequences:  A111079 A111080 A111081 * A111083 A111084 A111085

KEYWORD

nonn,easy

AUTHOR

Parthasarathy Nambi, Oct 11 2005

STATUS

approved

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Last modified March 3 03:03 EST 2021. Contains 341756 sequences. (Running on oeis4.)