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A086301 Numbers n such that 1 +/- 2n + 3n^2 are primes. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
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
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Aug 28 2003
STATUS
approved

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Last modified June 23 04:09 EDT 2024. Contains 373629 sequences. (Running on oeis4.)