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A069944 formatted as a simple table:

n a(n)
1 1
2 1
3 1
4 3
5 12
6 60
7 180
8 630
9 10080
10 18144
11 453600
12 2494800
13 59875200
14 778377600
15 1089728640
16 40864824000
17 1307674368000
18 22230464256000
19 15390321408000
20 380140938777600
21 76028187755520000
22 1596591942865920000

[1,1,1,3,12,60,180,630,10080,18144,453600,2494800,
 59875200,778377600,1089728640,40864824000,
 1307674368000,22230464256000,15390321408000,
 380140938777600,76028187755520000,
 1596591942865920000]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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