A121212 - OEIS

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A121212 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	1
8	0
9	5
10	5
11	0
12	21
13	26
14	0
15	95
16	118
17	0
18	423
19	543
20	0
21	1923
22	2507
23	0
24	8869
25	11676
26	0
27	41410
28	54893
29	0
30	195353
31	260220
32	0
33	929423
34	1242820
35	0

[0,0,0,0,0,1,1,0,5,5,0,21,26,0,95,118,0,423,543,0, 1923,2507,0,8869,11676,0,41410,54893,0,195353, 260220,0,929423,1242820,0]