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Search: id:A135783
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| A135783 |
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Numbers of the form 3x y^2+x^3 (where x,y are positive integers). |
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+0
1
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| 4, 13, 14, 28, 32, 36, 49, 62, 63, 76, 104, 108, 109, 112, 140, 148, 158, 171, 172, 185, 193, 224, 234, 244, 252, 256, 260, 288, 301, 302, 351, 364, 365, 378, 392, 427, 433, 468, 494, 496, 500, 504, 508, 532, 536, 589, 603, 608, 652, 665, 666, 676, 679, 728
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OFFSET
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1,1
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MATHEMATICA
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a = {}; Do[Do[w = 3x y^2 + x^3; If[(w > 0) && w < 3000, AppendTo[a, w]], {x, 1, 1000}], {y, 1, 1000}]; Union[a]
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CROSSREFS
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Cf. A135781, A135782.
Sequence in context: A081738 A043049 A135465 this_sequence A135406 A066825 A014563
Adjacent sequences: A135780 A135781 A135782 this_sequence A135784 A135785 A135786
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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), Nov 29 2007
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