A058820
formatted as a simple table:
n
a(n)
0
1
1
5
2
15
3
85
4
475
5
2501
6
13045
7
66965
8
341875
9
1736125
10
8789377
11
44389205
12
223796925
13
1126802885
[1,5,15,85,475,2501,13045,66965,341875,1736125, 8789377,44389205,223796925,1126802885]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
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