A114270 - OEIS

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A114270

Numbers k such that k^2 + 7 is prime.

18

0, 2, 4, 6, 8, 10, 12, 16, 18, 22, 26, 30, 32, 34, 36, 38, 40, 48, 52, 58, 60, 62, 66, 74, 76, 78, 100, 106, 110, 114, 116, 118, 120, 122, 124, 132, 136, 138, 144, 146, 148, 158, 162, 164, 176, 184, 186, 190, 192, 194, 206, 208, 216, 220, 228, 232, 248, 250, 256, 258

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OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..2500

MATHEMATICA

Select[Range[0, 1000], PrimeQ[#^2+7]&] (* Vladimir Joseph Stephan Orlovsky, Feb 27 2011 *)

PROG

(PARI) is(n)=isprime(n^2+7) \\ Charles R Greathouse IV, Jan 21 2015

CROSSREFS

Other sequences of the type "Numbers k such that k^2 + i is prime": A005574 (i=1), A067201 (i=2), A049422 (i=3), A007591 (i=4), A078402 (i=5), A114269 (i=6), this sequence (i=7), A114271 (i=8), A114272 (i=9), A114273 (i=10), A114274 (i=11), A114275 (i=12).

Sequence in context: A071596 A090778 A097380 * A109884 A015926 A085154

Adjacent sequences: A114267 A114268 A114269 * A114271 A114272 A114273

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 19 2005

STATUS

approved