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A127435
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Primes p such that (p-1)^2 + 1 is prime.
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7
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2, 3, 5, 7, 11, 17, 37, 41, 67, 127, 131, 151, 157, 181, 211, 241, 251, 257, 271, 281, 307, 397, 401, 421, 431, 467, 491, 557, 571, 577, 647, 691, 701, 751, 761, 827, 907, 911, 937, 947, 967, 1061, 1097, 1151, 1277, 1291, 1307, 1321, 1367, 1567, 1571, 1861
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Consists of 3 and a subsequence of A045349.
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FORMULA
| a(n) = Sqrt(A127436(n)-1) + 1.
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MATHEMATICA
| Select[Prime@Range[300], PrimeQ[(# - 1)^2 + 1] &] (*Chandler*)
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CROSSREFS
| For the associated primes, see A127436.
Sequence in context: A062294 A113016 A085136 * A068868 A038887 A178991
Adjacent sequences: A127432 A127433 A127434 * A127436 A127437 A127438
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KEYWORD
| nonn
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AUTHOR
| Lekraj Beedassy (blekraj(AT)yahoo.com), Jan 14 2007
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EXTENSIONS
| Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jan 23 2007
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