A012412 - OEIS

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A012412 as a simple table

n	a(n)
0	1
1	0
2	-1
3	-6
4	-15
5	20
6	255
7	70
8	-3423
9	46728
10	501375
11	-3625358
12	-60112239
13	420430556
14	9211149311
15	-79037179650
16	-2033765765567
17	18361020368016
18	572833991092479
19	-5418169914165654
20	-201869115241158607

[1,0,-1,-6,-15,20,255,70,-3423,46728,501375, -3625358,-60112239,420430556,9211149311, -79037179650,-2033765765567,18361020368016, 572833991092479,-5418169914165654, -201869115241158607]