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A061566 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 10
6 33
7 105
8 349
9 1193
10 4189
11 15070
12 55426
13 207981
14 794847
15 3089232
16 12194590
17 48836860
18 198228772
19 814795476
20 3388909439
21 14252884342
22 60577219672
23 260038762861
24 1126860038414
25 4927261126518
26 21730146696443

[0,0,1,3,10,33,105,349,1193,4189,15070,55426,
 207981,794847,3089232,12194590,48836860,198228772,
 814795476,3388909439,14252884342,60577219672,
 260038762861,1126860038414,4927261126518,
 21730146696443]

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Last modified January 17 16:49 EST 2022. Contains 350402 sequences. (Running on oeis4.)