|
| |
|
|
A145333
|
|
Numbers n such that there exists x in N : (x+43)^3-x^3=n^2
|
|
0
| |
|
|
12943, 436295587, 14707524224827, 495790641182622583, 16713102499558683048103, 563398684764332564368929547, 18992169646692548245317931981267, 640226038226607116585334922719581023
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
FORMULA
| a(n+2)=33710*a(n+1)-a(n)
a(n)=(12943/2)*{[16855+1484*sqrt(129)]^n+[16855-1484*sqrt(129)]^n}-(2279/4)*sqrt(129)*{[16855-1484*sqrt(129)]^n-[16855+1484*sqrt(129)]^n}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 25 2008]
|
|
|
EXAMPLE
| a(1)=12943 because the first relation is : (1118+43)^3-1118^3=12943^2
|
|
|
CROSSREFS
| Sequence in context: A162895 A086004 A090887 * A190468 A028385 A190947
Adjacent sequences: A145330 A145331 A145332 * A145334 A145335 A145336
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 08 2008
|
| |
|
|
