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A033246
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Primes of form x^2+71*y^2.
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4
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71, 107, 293, 509, 643, 647, 739, 971, 1013, 1039, 1123, 1217, 1361, 1367, 1373, 1423, 1663, 1811, 2083, 2099, 2239, 2309, 2351, 2557, 2657, 2677, 2917, 3181, 3343, 3517, 3533, 3539, 3623, 3671, 3803
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OFFSET
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1,1
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COMMENTS
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Also primes of the form x^2-xy+18y^2 with x and y nonnegative. - T. D. Noe, May 08 2005
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REFERENCES
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D. Cox, "Primes of Form x^2 + n y^2", Wiley, 1989.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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QuadPrimes[1, 0, 71, 10000] (* see A106856 *)
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CROSSREFS
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Sequence in context: A195270 A142111 A164289 * A141879 A026063 A115395
Adjacent sequences: A033243 A033244 A033245 * A033247 A033248 A033249
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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