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A160873 as a simple table

n a(n)
1 0
2 3
3 42
4 420
5 3720
6 31248
7 256032
8 2072640
9 16679040
10 133824768
11 1072169472
12 8583644160
13 68694312960
14 549655154688
15 4397643866112
16 35182761492480
17 281468534292480
18 2251774043947008
19 18014295430397952
20 144114775759257600

[0,3,42,420,3720,31248,256032,2072640,16679040,
 133824768,1072169472,8583644160,68694312960,
 549655154688,4397643866112,35182761492480,
 281468534292480,2251774043947008,
 18014295430397952,144114775759257600]

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Last modified April 18 11:06 EDT 2019. Contains 322209 sequences. (Running on oeis4.)