The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A145207 Numbers n such that there exists x in N with (x+67)^3-x^3=n^2. 1
 139159, 143360071051, 147688111595890531, 152146815684827106059839, 156740128050204348280189648879, 161472112515887870739083747272597171, 166346955592585785428646481254476689943611 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Index entries for linear recurrences with constant coefficients, signature (1030190,-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 Adjacent sequences:  A145204 A145205 A145206 * A145208 A145209 A145210 KEYWORD easy,nonn AUTHOR Richard Choulet, Oct 04 2008 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 29 01:49 EST 2020. Contains 331328 sequences. (Running on oeis4.)