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A128566 as a simple table

n a(n)
0 1
1 0
2 0
3 1
4 5
5 22
6 90
7 359
8 1415
9 5545
10 21670
11 84591
12 330121
13 1288587
14 5032235
15 19664205
16 76893687
17 300895513
18 1178290263
19 4617369760
20 18106447251
21 71048746505
22 278966179936
23 1095987764828
24 4308300939450
25 16944940572831
26 66680029591816
27 262519664110588

[1,0,0,1,5,22,90,359,1415,5545,21670,84591,330121,
 1288587,5032235,19664205,76893687,300895513,
 1178290263,4617369760,18106447251,71048746505,
 278966179936,1095987764828,4308300939450,
 16944940572831,66680029591816,262519664110588]

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Last modified March 3 04:21 EST 2021. Contains 341756 sequences. (Running on oeis4.)