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A150218 as a simple table

n a(n)
0 1
1 2
2 6
3 21
4 82
5 321
6 1299
7 5392
8 22871
9 98108
10 424699
11 1856216
12 8183556
13 36317895
14 161980553
15 725942682
16 3268471012
17 14774712211
18 67005494929
19 304779943331
20 1390265877349
21 6358331776667
22 29145901592320
23 133874784240042
24 616114068765967
25 2840641129896737
26 13118766404752789
27 60677043758756303

[1,2,6,21,82,321,1299,5392,22871,98108,424699,
 1856216,8183556,36317895,161980553,725942682,
 3268471012,14774712211,67005494929,304779943331,
 1390265877349,6358331776667,29145901592320,
 133874784240042,616114068765967,2840641129896737,
 13118766404752789,60677043758756303]

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Last modified July 27 02:39 EDT 2021. Contains 346302 sequences. (Running on oeis4.)