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A091567
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Primes p such that p^2-p-1 is prime.
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12
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3, 5, 7, 11, 17, 29, 31, 47, 61, 67, 71, 97, 101, 127, 131, 139, 149, 181, 197, 241, 269, 307, 331, 359, 379, 397, 409, 419, 421, 449, 457, 479, 487, 491, 599, 607, 617, 619, 641, 647, 677, 709, 751, 787, 839, 857, 907, 947, 967, 977, 997, 1051, 1061, 1091
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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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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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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MATHEMATICA
| Select[Prime[Range[250]], PrimeQ[ #^2-#-1]&] - Alexander Adamchuk (alex(AT)kolmogorov.com), Jul 27 2006
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PROG
| (PARI) isA091567(n)=isprime(n) && isprime(n^2-n-1) [From Michael B. Porter (michael_b_porter(AT)yahoo.com), May 12 2010]
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CROSSREFS
| Cf. A053182 (p^2+p+1 prime), A053184 (p^2+p-1 prime), A065508 (p^2-p+1 prime).
Cf. A091568 Primes of the form p^2-p-1, where p is prime from a(n).
Sequence in context: A024967 A135246 A109543 * A076186 A092564 A068811
Adjacent sequences: A091564 A091565 A091566 * A091568 A091569 A091570
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KEYWORD
| nonn
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AUTHOR
| T. D. Noe (noe(AT)sspectra.com), Jan 21 2004
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