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A212913 as a simple table

n a(n)
0 1
1 1
2 2
3 8
4 44
5 308
6 2648
7 26912
8 315536
9 4193744
10 62302496
11 1023057536
12 18400342208
13 359733922880
14 7595810693504
15 172270928222720
16 4176595617747200
17 107793463235860736
18 2950683535353324032
19 85386983313510877184
20 2604521649171407301632
21 83519383797513832420352

[1,1,2,8,44,308,2648,26912,315536,4193744,
 62302496,1023057536,18400342208,359733922880,
 7595810693504,172270928222720,4176595617747200,
 107793463235860736,2950683535353324032,
 85386983313510877184,2604521649171407301632,
 83519383797513832420352]

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Last modified July 20 11:28 EDT 2019. Contains 325180 sequences. (Running on oeis4.)