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A005216 as a simple table

n a(n)
1 1
2 0
3 0
4 0
5 0
6 4
7 31
8 199
9 1313
10 9158
11 68336
12 546697
13 4682870
14 42818887
15 416581477
16 4298371842
17 46896673051
18 539527125454
19 6528590200432
20 82900013695783
21 1102289694637302
22 15317689255215159
23 222056321177147564
24 3352587738814695770

[1,0,0,0,0,4,31,199,1313,9158,68336,546697,
 4682870,42818887,416581477,4298371842,46896673051,
 539527125454,6528590200432,82900013695783,
 1102289694637302,15317689255215159,
 222056321177147564,3352587738814695770]

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Last modified September 19 15:20 EDT 2019. Contains 327198 sequences. (Running on oeis4.)