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Search: id:A087887
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| 0, 24, 168, 540, 1248, 2400, 4104, 6468, 9600, 13608, 18600, 24684, 31968, 40560, 50568, 62100, 75264, 90168, 106920, 125628, 146400, 169344, 194568, 222180, 252288, 285000, 320424, 358668, 399840, 444048, 491400, 542004, 595968, 653400
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Another parametric representation of the solutions of the diophantine equation x^2 - y^2 =z^3 is (x,y,z) = (15n^3, 3n^3, 6n^2), thus getting a(n) = 18n^3 + 6n^2.
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FORMULA
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O.g.f.: 12x(2+6x+x^2)/(-1+x)^4. a(n)=12*A036659(n). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 07 2008
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CROSSREFS
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Cf. A085409, A085482.
Sequence in context: A126492 A136380 A019583 this_sequence A052761 A073993 A052758
Adjacent sequences: A087884 A087885 A087886 this_sequence A087888 A087889 A087890
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KEYWORD
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easy,nonn
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AUTHOR
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Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Oct 13 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 06 2003
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