A213338 - OEIS

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A213338 as a simple table

n	a(n)
1	1
2	1
3	2
4	2
5	10
6	26
7	32
8	74
9	54
10	198
11	486
12	726
13	1112
14	1438
15	1570
16	1576
17	1220
18	954
19	888
20	464
21	194
22	116
23	48
24	8
25	0
26	0
27	0
28	36
29	0

[1,1,2,2,10,26,32,74,54,198,486,726,1112,1438, 1570,1576,1220,954,888,464,194,116,48,8,0,0,0,36, 0]