A053572
formatted as a simple table:
n
a(n)
0
1
1
1
2
1
3
3
4
16
5
75
6
384
7
1805
8
8640
9
42336
10
207368
11
995808
12
5184000
13
24192672
14
121730700
15
594350400
16
2921811200
[1,1,1,3,16,75,384,1805,8640,42336,207368,995808, 5184000,24192672,121730700,594350400,2921811200]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 9 18:50 EST 2009. Contains 170568 sequences.
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