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A156586 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 4
5 1
6 1
7 20
8 20
9 1
10 1
11 120
12 600
13 120
14 1
15 1
16 840
17 25200
18 25200
19 840
20 1
21 1
22 6720
23 1411200
24 8467200
25 1411200
26 6720
27 1
28 1
29 60480
30 101606400
31 4267468800
32 4267468800
33 101606400
34 60480
35 1
36 1
37 604800
38 9144576000
39 3072577536000
40 21508042752000

[1,1,1,1,4,1,1,20,20,1,1,120,600,120,1,1,840,
 25200,25200,840,1,1,6720,1411200,8467200,1411200,
 6720,1,1,60480,101606400,4267468800,4267468800,
 101606400,60480,1,1,604800,9144576000,
 3072577536000,21508042752000]

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Last modified April 16 10:45 EDT 2024. Contains 371709 sequences. (Running on oeis4.)