A086301 Numbers n such that 1 +/- 2n + 3n^2 are primes.

12, 18, 90, 120, 216, 276, 282, 396, 408, 618, 684, 792, 810, 948, 978, 1122, 1200, 1236, 1404, 1560, 1632, 1716, 1728, 1734, 1806, 1836, 2202, 2226, 2268, 2418, 2430, 2460, 2490, 2556, 2826, 2856, 3018, 3054, 3084, 3168, 3186, 3258, 3282, 3384, 3456

Offset

1,1

Links

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

Mathematica

Select[Range[4000], AllTrue[1+3#^2+{2#, -2#}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Mar 06 2017 *)

Crossrefs

Sequence in context: A226176 A177426 A232384 * A231094 A258427 A166627

Adjacent sequences: A086298 A086299 A086300 * A086302 A086303 A086304

Keyword

easy,nonn

Author

Zak Seidov, Aug 28 2003

Status

approved