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Search: id:A139499
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| A139499 |
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Primes of the form x^2 + 19x*y + y^2 for x and y nonnegative. |
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+0
2
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| 43, 67, 127, 151, 331, 373, 421, 457, 463, 613, 631, 739, 757, 883, 919, 967, 1033, 1087, 1171, 1327, 1381, 1429, 1453, 1471, 1549, 1579, 1597, 1747, 1759, 1789, 1801, 2053, 2083, 2143, 2269, 2293, 2311, 2347, 2389, 2473, 2503, 2671, 2767, 2797, 2857
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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a = {}; w = 19; k = 1; Do[Do[If[PrimeQ[n^2 + w*n*m + k*m^2], AppendTo[a, n^2 + w*n*m + k*m^2]], {n, m, 400}], {m, 1, 400}]; Union[a] (*Artur Jasinski*)
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CROSSREFS
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Cf. A139489, A007645, A068228, A007519, A033212, A033212, A107152, A107008, A033215, A107145, A139490, A139491.
Sequence in context: A039385 A043208 A043988 this_sequence A033229 A139875 A087765
Adjacent sequences: A139496 A139497 A139498 this_sequence A139500 A139501 A139502
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Apr 24 2008
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