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A089747
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Numbers n such that n^2 - 2n + 5 is prime.
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0
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0, 2, 4, 6, 8, 14, 16, 18, 28, 34, 36, 38, 46, 48, 58, 66, 68, 74, 86, 88, 96, 98, 104, 116, 118, 126, 136, 138, 148, 156, 164, 168, 178, 184, 194, 204, 208, 216, 218, 234, 236, 244, 246, 254, 256, 266, 268, 276, 278, 288, 294, 304, 308, 314, 318, 348, 358, 374
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
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FORMULA
| a(n) = A007591(n)+1.
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PROG
| (MAGMA) [n: n in [0..100]|IsPrime(n^2-2*n+5)] [From Vincenzo Librandi, Nov 16 2010]
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CROSSREFS
| Cf. A005473 gives primes, A007591.
Sequence in context: A086529 A054409 A152973 * A173144 A049015 A005250
Adjacent sequences: A089744 A089745 A089746 * A089748 A089749 A089750
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KEYWORD
| nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jan 08 2004
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