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A131657 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 2
6 36
7 36
8 144
9 144
10 1440
11 1440
12 17280
13 17280
14 241920
15 3628800
16 29030400
17 29030400
18 1567641600
19 1567641600
20 783820800000
21 9876142080000
22 651825377280000
23 217275125760000
24 8691005030400000

[1,1,1,2,2,36,36,144,144,1440,1440,17280,17280,
 241920,3628800,29030400,29030400,1567641600,
 1567641600,783820800000,9876142080000,
 651825377280000,217275125760000,8691005030400000]

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Last modified March 28 13:17 EDT 2024. Contains 371254 sequences. (Running on oeis4.)