C
n
in terms of x
n
C
n
in terms of x
n
2
1
-2
0
1
0
0
0
0
0
0
0
0
-3
0
1
0
0
0
0
0
0
2
0
-4
0
1
0
0
0
0
0
0
5
0
-5
0
1
0
0
0
0
-2
0
9
0
-6
0
1
0
0
0
0
-7
0
14
0
-7
0
1
0
0
2
0
-16
0
20
0
-8
0
1
0
0
9
0
-30
0
27
0
-9
0
1
Related problem:
Express x
n
+ 1/x
n
as a function of x + 1/x.
Reference: Abramowitz p. 797.
