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A210361
Prime numbers p such that x^2 + x + p produces primes for x = 0..2 but not x = 3.
7
107, 191, 311, 461, 821, 857, 881, 1301, 1871, 1997, 2081, 2237, 2267, 2657, 3251, 3461, 3671, 4517, 4967, 5231, 5477, 5501, 5651, 6197, 6827, 7877, 8087, 8291, 8537, 8861, 9431, 10427, 10457, 11171, 12917, 13001, 13691, 13757, 13877, 14081, 14321, 15641
OFFSET
1,1
COMMENTS
The first term is A164926(3).
MATHEMATICA
lookfor = 3; t = {}; n = 0; While[Length[t] < 50, n++; c = Prime[n]; i = 1; While[PrimeQ[i^2 + i + c], i++]; If[i == lookfor, AppendTo[t, c]]]; t
KEYWORD
nonn
AUTHOR
T. D. Noe, Apr 05 2012
STATUS
approved