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A139993
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Primes of the form 21x^2+40y^2.
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1
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61, 181, 229, 349, 661, 829, 1021, 1069, 1669, 1741, 1861, 2029, 2341, 2749, 3181, 3541, 3709, 4021, 4261, 4549, 4861, 5101, 5701, 5869, 6229, 6709, 6781, 6949, 7069, 7549, 7621, 7741, 7789, 8221, 8389, 8461, 8581, 8629, 9421, 9901, 10069
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Discriminant=-3360. See A139827 for more information.
Also primes of the form 45x^2+30xy+61y^2. See A140633. - T. D. Noe (noe(AT)sspectra.com), May 19 2008
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FORMULA
| The primes are congruent to {61, 181, 229, 349, 661, 829} (mod 840).
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MATHEMATICA
| QuadPrimes[21, 0, 40, 10000] (* see A106856 *)
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CROSSREFS
| Sequence in context: A007488 A142538 A057216 * A088955 A087870 A121513
Adjacent sequences: A139990 A139991 A139992 * A139994 A139995 A139996
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KEYWORD
| nonn,easy
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AUTHOR
| T. D. Noe (noe(AT)sspectra.com), May 02 2008
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