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Search: id:A139505
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| A139505 |
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Primes of the form x^2 + 25x*y + y^2 for x and y nonnegative. |
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+0
2
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| 151, 163, 307, 397, 409, 541, 547, 601, 673, 811, 823, 859, 967, 997, 1153, 1231, 1237, 1327, 1567, 1669, 1741, 1879, 2083, 2143, 2281, 2293, 2557, 2677, 2707, 2833, 2971, 3037, 3259, 3313, 3433, 3877, 4003, 4129, 4153, 4603, 4639, 4861, 4957, 5101, 5227
(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 = 25; 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.
Adjacent sequences: A139502 A139503 A139504 this_sequence A139506 A139507 A139508
Sequence in context: A068274 A068286 A115483 this_sequence A095745 A112796 A020359
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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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