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A190790 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 18
5 58
6 198
7 696
8 2506
9 9205
10 34344
11 129792
12 495834
13 1911640
14 7428444
15 29064650
16 114404410
17 452719183
18 1799994588
19 7187148262
20 28807364008
21 115865980972
22 467497031164
23 1891710323324
24 7675031497682
25 31215088847239

[1,1,2,6,18,58,198,696,2506,9205,34344,129792,
 495834,1911640,7428444,29064650,114404410,
 452719183,1799994588,7187148262,28807364008,
 115865980972,467497031164,1891710323324,
 7675031497682,31215088847239]

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Last modified July 10 15:45 EDT 2020. Contains 335577 sequences. (Running on oeis4.)