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Search: id:A139846
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| A139846 |
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Primes of the form 5x^2+21y^2. |
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+0
1
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| 5, 41, 89, 101, 269, 461, 509, 521, 761, 881, 929, 941, 1049, 1109, 1181, 1301, 1361, 1601, 1721, 1889, 1949, 2141, 2309, 2441, 2609, 2621, 2729, 2789, 2861, 3041, 3209, 3449, 3461, 3701, 3821, 3881, 3989, 4049, 4241, 4289, 4409, 4721, 4889
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Discriminant=-420. See A139827 for more information.
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FORMULA
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The primes are congruent to {5, 41, 89, 101, 209, 269, 341} (mod 420).
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MATHEMATICA
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QuadPrimes[5, 0, 21, 10000] (* see A106856 *)
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CROSSREFS
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Sequence in context: A106963 A031415 A031917 this_sequence A142101 A102265 A128347
Adjacent sequences: A139843 A139844 A139845 this_sequence A139847 A139848 A139849
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KEYWORD
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nonn,easy
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AUTHOR
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T. D. Noe (noe(AT)sspectra.com), May 02 2008
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