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A309895 as a simple table

n a(n)
0 2
1 2
2 3
3 4
4 11
5 34
6 2136
7 7013320
8 29281354514767168
9 234431745534048922731115555415680
10 1994324729203114587259985605157804740271034553359179870979936357974016

[2,2,3,4,11,34,2136,7013320,29281354514767168,
 234431745534048922731115555415680,
 19943247292031145872599856051578047402710345533591\
 79870979936357974016]

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Last modified January 23 07:07 EST 2020. Contains 331168 sequences. (Running on oeis4.)