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A066582 as a simple table

n a(n)
1 2
2 15
3 7
4 21
5 108
6 2268
7 5040
8 79380
9 20575296
10 147
11 1134
12 102060
13 555660
14 1102248
15 1524096
16 48988800
17 1365590016
18 17360406
19 437482231200
20 559977255936
21 92876046336
22 743317957509120
23 4592700000000
24 133978933305000000

[2,15,7,21,108,2268,5040,79380,20575296,147,1134,
 102060,555660,1102248,1524096,48988800,1365590016,
 17360406,437482231200,559977255936,92876046336,
 743317957509120,4592700000000,133978933305000000]

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Last modified June 30 18:22 EDT 2024. Contains 373877 sequences. (Running on oeis4.)