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Search: id:A139503
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| A139503 |
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Primes of the form x^2 + 23x*y + y^2 for x and y nonnegative. |
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+0
2
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| 79, 109, 151, 211, 331, 379, 421, 499, 541, 571, 631, 709, 739, 751, 919, 991, 1009, 1051, 1129, 1171, 1201, 1381, 1429, 1471, 1549, 1579, 1621, 1759, 1789, 1801, 1831, 1999, 2011, 2179, 2221, 2251, 2269, 2311, 2389, 2521, 2671, 2689, 2731, 2851, 3019
(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 = 23; 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: A112795 A107162 A135143 this_sequence A134240 A052162 A135985
Adjacent sequences: A139500 A139501 A139502 this_sequence A139504 A139505 A139506
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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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