A013379 - OEIS

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A013379 as a simple table

n	a(n)
0	1
1	0
2	0
3	1
4	0
5	-15
6	10
7	271
8	-840
9	-7655
10	60870
11	284491
12	-4949780
13	-9609795
14	484684330
15	-382526689
16	-57168678320
17	229639178065
18	7957246947790
19	-65098408980269
20	-1270811040444460
21	17837435546853925

[1,0,0,1,0,-15,10,271,-840,-7655,60870,284491, -4949780,-9609795,484684330,-382526689, -57168678320,229639178065,7957246947790, -65098408980269,-1270811040444460, 17837435546853925]