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A088503
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Numbers n such that (n^2 + 3)/4 is prime.
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4
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3, 5, 7, 11, 13, 17, 25, 29, 31, 35, 41, 43, 49, 55, 67, 77, 83, 101, 109, 115, 119, 125, 133, 139, 143, 151, 155, 157, 161, 179, 181, 199, 203, 211, 221, 223, 235, 239, 263, 277, 283, 287, 295, 301, 307, 311, 323, 325, 329, 335, 337, 347, 353, 377, 379, 385
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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(25*25 + 3)/4 = 157, 157 is prime, 25 is the 7th term of the sequence.
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MATHEMATICA
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PROG
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(Magma) [n: n in [1..400 by 2] | IsPrime((n^2 + 3) div 4)]; // Vincenzo Librandi, Oct 06 2012
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CROSSREFS
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KEYWORD
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easy,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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