|
| |
|
|
A145530
|
|
Numbers x such that there exists n in N with (x+1)^3-x^3=91*n^2
|
|
0
| |
|
|
5, 8002, 11635629, 16918197290, 24599047224757, 35766997746600114, 52005190124509341725, 75615510674038836268762, 109944900514862343425438949, 159859809733099173301751963810
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
FORMULA
| a(n+2)=1454*a(n+1)-a(n)+726
a(n)=-(1/2)+(11/4)*{[727-44*sqrt(273)]^n+[727+44*sqrt(273)]^n}-(1/6)*sqrt(273)*{[727-44 *sqrt(273)]^n-[727+44*sqrt(273)]^n}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 25 2008]
|
|
|
EXAMPLE
| a(1)=5 because the first relation is (5+1)^3-5^3=91*1^2
|
|
|
CROSSREFS
| Sequence in context: A117711 A203689 A116140 * A067816 A076629 A052027
Adjacent sequences: A145527 A145528 A145529 * A145531 A145532 A145533
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 12 2008, Oct 13 2008
|
| |
|
|
