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A289020 as a simple table

n a(n)
0 1
1 1
2 2
3 10
4 92
5 1348
6 28808
7 845800
8 32664944
9 1605553552
10 97868465696
11 7245440815264
12 640359291096512
13 66598657958731840
14 8051483595083729024
15 1119653568781387712128
16 177465810459239319017216
17 31804047327185301634148608
18 6398867435594240638421950976

[1,1,2,10,92,1348,28808,845800,32664944,
 1605553552,97868465696,7245440815264,
 640359291096512,66598657958731840,
 8051483595083729024,1119653568781387712128,
 177465810459239319017216,
 31804047327185301634148608,
 6398867435594240638421950976]

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Last modified September 27 15:29 EDT 2020. Contains 337383 sequences. (Running on oeis4.)