A120646 - OEIS

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A120646 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	8
10	41
11	89
12	214
13	406
14	874
15	1107
16	2210
17	1316
18	7380
19	5450
20	18211
21	21866
22	47702
23	10390
24	201834
25	28784

[0,0,0,0,0,0,0,1,8,41,89,214,406,874,1107,2210, 1316,7380,5450,18211,21866,47702,10390,201834, 28784]