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A150229 as a simple table

n a(n)
0 1
1 2
2 6
3 22
4 80
5 310
6 1252
7 5148
8 21482
9 91276
10 392896
11 1701500
12 7442013
13 32815590
14 145380566
15 647569948
16 2900243037
17 13040713888
18 58828778368
19 266395866595
20 1210193354780
21 5510852683899
22 25161291048035
23 115172327913152
24 528225223735864
25 2427259219164773
26 11175758755982136
27 51542960940788254

[1,2,6,22,80,310,1252,5148,21482,91276,392896,
 1701500,7442013,32815590,145380566,647569948,
 2900243037,13040713888,58828778368,266395866595,
 1210193354780,5510852683899,25161291048035,
 115172327913152,528225223735864,2427259219164773,
 11175758755982136,51542960940788254]

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Last modified January 19 17:59 EST 2020. Contains 331051 sequences. (Running on oeis4.)