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A209797 as a simple table

n a(n)
1 2
2 6
3 18
4 56
5 188
6 695
7 2838
8 12726
9 62140
10 327760
11 1854488
12 11189273
13 71627546
14 484332314
15 3446042310
16 25712613664
17 200599911596
18 1632055365951
19 13814906940846
20 121414108567114
21 1105838412755384
22 10420517690466168
23 101439025287805552
24 1018689421191417393

[2,6,18,56,188,695,2838,12726,62140,327760,
 1854488,11189273,71627546,484332314,3446042310,
 25712613664,200599911596,1632055365951,
 13814906940846,121414108567114,1105838412755384,
 10420517690466168,101439025287805552,
 1018689421191417393]

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Last modified September 26 23:44 EDT 2022. Contains 357051 sequences. (Running on oeis4.)