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A232974 as a simple table

n a(n)
0 1
1 2
2 2
3 10
4 66
5 538
6 5170
7 56906
8 704226
9 9671930
10 145992338
11 2403271594
12 42869336130
13 824103252058
14 16991417367538
15 374154425946890
16 8765990409737634
17 217771226025864122
18 5718895163944768850
19 158315176568802482794
20 4608155971186431515394

[1,2,2,10,66,538,5170,56906,704226,9671930,
 145992338,2403271594,42869336130,824103252058,
 16991417367538,374154425946890,8765990409737634,
 217771226025864122,5718895163944768850,
 158315176568802482794,4608155971186431515394]

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)