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A027315 as a simple table

n a(n)
0 1
1 2
2 6
3 20
4 90
5 692
6 5774
7 48924
8 417440
9 3580036
10 30831756
11 266463804
12 2309848194
13 20074999500
14 174867895438
15 1526259877412
16 13344806416950
17 116863477094660
18 1024844657752730
19 8998915251701628
20 79108591391227406
21 696167664755023388
22 6132277201334483178

[1,2,6,20,90,692,5774,48924,417440,3580036,
 30831756,266463804,2309848194,20074999500,
 174867895438,1526259877412,13344806416950,
 116863477094660,1024844657752730,8998915251701628,
 79108591391227406,696167664755023388,
 6132277201334483178]

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Last modified December 4 21:02 EST 2022. Contains 358570 sequences. (Running on oeis4.)