A051906 - OEIS

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A051906 as a simple table

n	a(n)
1	1
2	0
3	0
4	0
5	10
6	0
7	28
8	0
9	0
10	0
11	88
12	0
13	4524
14	0
15	0
16	0
17	140692
18	0
19	820496
20	0
21	0
22	0
23	128850048
24	0
25	1957725000
26	0
27	0
28	0
29	605917055356
30	0
31	13404947681712
32	0
33	0
34	0

[1,0,0,0,10,0,28,0,0,0,88,0,4524,0,0,0,140692,0, 820496,0,0,0,128850048,0,1957725000,0,0,0, 605917055356,0,13404947681712,0,0,0]