A234252 - cp's OEIS frontend

A234252 a(n) = ((n-1)^(n+1) + (-1)^n*(n+1)^(n-1))/(n^2).

n	a(n)
1	-1
2	1
3	0
4	23
5	112
6	2637
7	28928
8	705259
9	12021504
10	337390073
11	7752749056
12	252186614847
13	7261683740672
14	271082082053317
15	9359536638984192
16	396049017137512403
17	15920162462882529280
18	754792662169555947633
19	34587513064809080815616
20	1818644980834260579498343

[-1, 1, 0, 23, 112, 2637, 28928, 705259, 12021504, 337390073, 7752749056, 252186614847, 7261683740672, 271082082053317, 9359536638984192, 396049017137512403, 15920162462882529280, 754792662169555947633, 34587513064809080815616, 1818644980834260579498343]

cp's OEIS Frontend

A234252 a(n) = ((n-1)^(n+1) + (-1)^n*(n+1)^(n-1))/(n^2).

Table of values

List of values