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Search: id:A139920
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| A139920 |
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Primes of the form 19x^2+18xy+19y^2. |
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+0
2
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| 19, 59, 131, 139, 251, 419, 619, 691, 811, 859, 971, 1091, 1259, 1291, 1459, 1531, 1571, 1699, 1811, 1931, 1979, 2099, 2131, 2371, 2411, 2539, 2579, 2659, 2819, 2939, 2971, 3251, 3331, 3491, 3499, 3659, 3779, 4051, 4091, 4219, 4259, 4339
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Discriminant=-1120. See A139827 for more information.
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FORMULA
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The primes are congruent to {19, 59, 131, 139, 171, 251} (mod 280).
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MATHEMATICA
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Union[QuadPrimes[19, 18, 19, 10000], QuadPrimes[19, -18, 19, 10000]] (* see A106856 *)
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CROSSREFS
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Sequence in context: A141773 A031375 A146351 this_sequence A142190 A139981 A158521
Adjacent sequences: A139917 A139918 A139919 this_sequence A139921 A139922 A139923
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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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