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A097698
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Numbers n such that both 4*n^2 - 3 and 4*n^2 + 3 are primes.
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7
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2, 4, 5, 7, 32, 46, 56, 70, 73, 86, 109, 149, 152, 161, 163, 170, 175, 178, 208, 220, 235, 254, 277, 280, 290, 313, 317, 326, 334, 343, 347, 352, 364, 368, 373, 385, 403, 409, 434, 446, 460, 527, 541, 551, 565, 578, 598, 628, 632, 689, 709, 710, 737, 761, 812
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| A153975 /2 = A097698. [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 23 2010]
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MATHEMATICA
| Select[Range[0, 7! ], PrimeQ[ #^2-3]&&PrimeQ[ #^2+3]&]/2 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 23 2010]
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PROG
| (MAGMA) [n: n in [1..1000] |IsPrime(4*n^2-3) and IsPrime(4*n^2+3)] [From Vincenzo Librandi, Nov 16 2010]
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CROSSREFS
| Cf. A083022, A097697.
Sequence in context: A005620 A049915 A119909 * A101410 A110991 A076990
Adjacent sequences: A097695 A097696 A097697 * A097699 A097700 A097701
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KEYWORD
| easy,nonn
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AUTHOR
| Carl R. White (cyrek(AT)cyreksoft.yorks.com), Aug 20 2004
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