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A111052
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Numbers n such that 3*n^2 + 4 is prime.
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2
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1, 3, 5, 7, 11, 19, 21, 25, 31, 33, 37, 39, 45, 49, 53, 73, 75, 77, 81, 89, 91, 93, 107, 115, 119, 129, 131, 135, 137, 145, 157, 185, 187, 193, 203, 205, 207, 213, 215, 221, 227, 229, 231, 249, 259, 261, 263, 271, 283, 291, 297, 299, 301, 317, 325, 327, 331
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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If n=77 then 3*n^2 + 4 = 17791 (prime).
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MATHEMATICA
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PROG
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(PARI) lista(nn) = {for(n=1, nn, if(ispseudoprime(3*n^2 + 4), print1(n, ", "))); } \\ Altug Alkan, Feb 05 2016
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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