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Search: id:A121979
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| A121979 |
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Numbers n such that (2n^2)^4 + 1 is prime. |
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+0
1
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| 1, 11, 12, 20, 24, 27, 28, 34, 40, 44, 61, 74, 79, 82, 95, 96, 119, 131, 136, 147, 148, 156, 164, 170, 173, 180, 187, 209, 211, 238, 252, 255, 269, 279, 299, 328, 337, 340, 343, 371, 379, 380, 388, 397, 413, 452, 462, 473, 476, 483, 516, 522, 527, 530, 539, 572
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OFFSET
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1,2
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COMMENT
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Corresponding primes of the form (2n^2)^4 + 1 are {17,3429742097,6879707137,409600000001,...}. There are consecutive twin pairs {a(n),a(n+1)} = {11,12},{27,28},{95,96},{147,148},...
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MATHEMATICA
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Select[Range[1000], PrimeQ[(2*#1^2)^4+1]&]
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CROSSREFS
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Cf. A000068.
Sequence in context: A105744 A092096 A057303 this_sequence A109372 A066686 A125887
Adjacent sequences: A121976 A121977 A121978 this_sequence A121980 A121981 A121982
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Sep 10 2006
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