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A075352 as a simple table

n a(n)
1 1
2 2
3 12
4 30
5 504
6 1320
7 43680
8 116280
9 6375600
10 17100720
11 1402410240
12 3776965920
13 8835488640
14 1022755734000
15 2478652606080
16 380634949094400
17 945378254620800
18 186127248627129600
19 470489622136934400
20 115590003914312928000

[1,2,12,30,504,1320,43680,116280,6375600,17100720,
 1402410240,3776965920,8835488640,1022755734000,
 2478652606080,380634949094400,945378254620800,
 186127248627129600,470489622136934400,
 115590003914312928000]

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Last modified April 19 08:39 EDT 2024. Contains 371782 sequences. (Running on oeis4.)