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A145207
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Numbers n such that there exists x in N with (x+67)^3-x^3=n^2.
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2
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139159, 143360071051, 147688111595890531, 152146815684827106059839, 156740128050204348280189648879, 161472112515887870739083747272597171, 166346955592585785428646481254476689943611
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n+2) = 1030190*a(n+1)-a(n).
G.f.: -139159*x*(x-1) / (x^2-1030190*x+1). - Colin Barker, Oct 19 2014
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EXAMPLE
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a(1)= 139159 because the first relation is : (9782+67)^3-9782^3=139159^2.
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MATHEMATICA
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LinearRecurrence[{1030190, -1}, {139159, 143360071051}, 20] (* Harvey P. Dale, Jul 11 2018 *)
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PROG
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(PARI) Vec(-139159*x*(x-1)/(x^2-1030190*x+1) + O(x^20)) \\ Colin Barker, Oct 19 2014
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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