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A145207
Numbers n such that there exists x in N with (x+67)^3-x^3=n^2.
2
139159, 143360071051, 147688111595890531, 152146815684827106059839, 156740128050204348280189648879, 161472112515887870739083747272597171, 166346955592585785428646481254476689943611
OFFSET
1,1
FORMULA
a(n+2) = 1030190*a(n+1)-a(n).
a(n) = 4489*A145210(n). - Colin Barker, Oct 19 2014
G.f.: -139159*x*(x-1) / (x^2-1030190*x+1). - Colin Barker, Oct 19 2014
EXAMPLE
a(1)= 139159 because the first relation is : (9782+67)^3-9782^3=139159^2.
MATHEMATICA
LinearRecurrence[{1030190, -1}, {139159, 143360071051}, 20] (* Harvey P. Dale, Jul 11 2018 *)
PROG
(PARI) Vec(-139159*x*(x-1)/(x^2-1030190*x+1) + O(x^20)) \\ Colin Barker, Oct 19 2014
CROSSREFS
Sequence in context: A236063 A234821 A221669 * A236745 A205213 A206221
KEYWORD
easy,nonn
AUTHOR
Richard Choulet, Oct 04 2008
STATUS
approved