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A064712
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Numbers n such that n^2 - prime(n) is a prime.
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2
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6, 10, 12, 18, 24, 28, 30, 40, 42, 48, 60, 76, 96, 104, 108, 114, 138, 146, 160, 166, 174, 176, 186, 190, 196, 198, 208, 230, 250, 258, 262, 270, 292, 296, 318, 320, 334, 336, 348, 356, 358, 362, 370, 372, 376, 382, 400, 420, 444, 454, 462, 472, 488, 494, 504
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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EXAMPLE
| 6 is in the sequence because 6^2 - Prime(6) = 36 - 13 = 23 is a prime.
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MATHEMATICA
| Select[ Range[ 1000 ], PrimeQ[ #^2 - Prime[ # ] ] & ]
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PROG
| (PARI) { n=0; for (m=1, 10^9, if (isprime(m^2 - prime(m)), write("b064712.txt", n++, " ", m); if (n==1000, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 23 2009]
(MAGMA) [n: n in [1..20000]|IsPrime(n^2-NthPrime(n))]; // Vincenzo Librandi, Apr 14 2011
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CROSSREFS
| A073497(a(n)) is a prime. [Zak Seidov, Apr 11 2011]
Sequence in context: A114520 A046288 A076763 * A098669 A046363 A101086
Adjacent sequences: A064709 A064710 A064711 * A064713 A064714 A064715
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KEYWORD
| easy,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 13 2001
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