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A004527 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 12
5 48
6 192
7 960
8 5760
9 34560
10 241920
11 1935360
12 15482880
13 139345920
14 1393459200
15 13934592000
16 153280512000
17 1839366144000
18 22072393728000
19 286941118464000
20 4017175658496000
21 56240459218944000 

[1,1,2,4,12,48,192,960,5760,34560,241920,1935360,
 15482880,139345920,1393459200,13934592000,
 153280512000,1839366144000,22072393728000,
 286941118464000,4017175658496000,
 56240459218944000]

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Last modified May 17 16:19 EDT 2024. Contains 372603 sequences. (Running on oeis4.)