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A159322 as a simple table

n a(n)
0 1
1 1
2 2
3 2
4 6
5 12
6 62
7 280
8 2380
9 22400
10 321776
11 5837608
12 146558244
13 4938979584
14 221994255984
15 13767288844128
16 1127789953750020
17 129161855009676368
18 19561367056434877784
19 4170365129835922726384
20 1181440903578343187882844

[1,1,2,2,6,12,62,280,2380,22400,321776,5837608,
 146558244,4938979584,221994255984,13767288844128,
 1127789953750020,129161855009676368,
 19561367056434877784,4170365129835922726384,
 1181440903578343187882844]

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Last modified June 21 00:06 EDT 2021. Contains 345319 sequences. (Running on oeis4.)