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A054091 as a simple table

n a(n)
0 1
1 2
2 4
3 10
4 32
5 130
6 652
7 3914
8 27400
9 219202
10 1972820
11 19728202
12 217010224
13 2604122690
14 33853594972
15 473950329610
16 7109254944152
17 113748079106434
18 1933717344809380
19 34806912206568842
20 661331331924808000
21 13226626638496160002
22 277759159408419360044

[1,2,4,10,32,130,652,3914,27400,219202,1972820,
 19728202,217010224,2604122690,33853594972,
 473950329610,7109254944152,113748079106434,
 1933717344809380,34806912206568842,
 661331331924808000,13226626638496160002,
 277759159408419360044]

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Last modified April 18 18:20 EDT 2024. Contains 371781 sequences. (Running on oeis4.)