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A049422
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Numbers n such that n^2+3 is prime.
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18
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0, 2, 4, 8, 10, 14, 22, 28, 38, 50, 52, 62, 64, 70, 74, 76, 92, 94, 106, 112, 122, 130, 134, 140, 146, 154, 158, 160, 172, 178, 218, 230, 242, 244, 248, 256, 274, 286, 298, 304, 316, 322, 326, 340, 350, 356, 364, 368, 398, 406, 416, 424, 430, 434, 440, 458, 470
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listen;
history;
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internal format)
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OFFSET
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1,2
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LINKS
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Zak Seidov, Table of n, a (n) for n = 1..1000
Eric Weisstein's World of Mathematics, Near-Square Prime
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EXAMPLE
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f(4) = 4^2+3=19 which is prime.
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MATHEMATICA
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lst={}; Do[If[PrimeQ[n^2+3], Print[n]; AppendTo[lst, n]], {n, 10^5}]; lst [From Vladimir Joseph Stephan Orlovsky, Aug 21 2008]
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PROG
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(PARI) isA049422(n) = isprime(n^2+3) [From Michael B. Porter, Mar 19 2010]
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CROSSREFS
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Sequence in context: A091992 A206037 A089033 * A178215 A067925 A102431
Adjacent sequences: A049419 A049420 A049421 * A049423 A049424 A049425
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Jobling (paul.jobling(AT)whitecross.com)
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STATUS
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approved
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