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A092475
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Primes p such that p + 2^2, p + 4^2 and p + 6^2 are also primes.
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2
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7, 37, 43, 67, 163, 277, 463, 487, 823, 1087, 1093, 1213, 1423, 2683, 3907, 4447, 5653, 7687, 8677, 8803, 11467, 11923, 13147, 13693, 15787, 16417, 16657, 16927, 18253, 18397, 19387, 20113, 20353, 21487, 27763, 28627, 30493, 34483, 38917, 39103, 40483, 41227
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OFFSET
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1,1
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LINKS
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FORMULA
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EXAMPLE
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a(3) = 43.
43 + 2^2 = 43 + 4 = 47, which is prime.
43 + 4^2 = 43 + 16 = 59, which is prime.
43 + 6^2 = 43 + 36 = 79, which is prime.
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MATHEMATICA
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Select[Prime[Range[5000]], And@@PrimeQ[{#+4, #+16, #+36}]&] (* Harvey P. Dale, Jun 09 2011 *)
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CROSSREFS
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KEYWORD
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nonn,changed
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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