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A122880 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 8
6 43
7 196
8 820
9 3265
10 12615
11 47840
12 179355
13 667875
14 2478022
15 9180616
16 34011401
17 126120212
18 468411235
19 1743105373
20 6500874434
21 24300686879
22 91049069203
23 341924710480
24 1286932932251
25 4854167659403
26 18346988061078

[0,0,0,1,8,43,196,820,3265,12615,47840,179355,
 667875,2478022,9180616,34011401,126120212,
 468411235,1743105373,6500874434,24300686879,
 91049069203,341924710480,1286932932251,
 4854167659403,18346988061078]

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Last modified July 24 05:05 EDT 2021. Contains 346273 sequences. (Running on oeis4.)