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A147905 as a simple table

n a(n)
1 1
2 2
3 6
4 16
5 74
6 384
7 1970
8 10282
9 65472
10 408096
11 3135626
12 22226326
13 167840010
14 1477742556
15 12643496462
16 132500787090

[1,2,6,16,74,384,1970,10282,65472,408096,3135626,
 22226326,167840010,1477742556,12643496462,
 132500787090]

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Last modified November 30 05:12 EST 2021. Contains 349419 sequences. (Running on oeis4.)