A056398 - OEIS

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A056398 as a simple table

n	a(n)
1	0
2	0
3	0
4	1
5	3
6	37
7	63
8	479
9	1316
10	8597
11	14619
12	155999
13	211231
14	1732907
15	5302823
16	21559909
17	43398413
18	466495335
19	625545865
20	5659500031
21	15126813765
22	72778025365
23	132561145173
24	1460519554091
25	2338565021382

[0,0,0,1,3,37,63,479,1316,8597,14619,155999, 211231,1732907,5302823,21559909,43398413, 466495335,625545865,5659500031,15126813765, 72778025365,132561145173,1460519554091, 2338565021382]