A013317 - OEIS

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A013317 as a simple table

n	a(n)
0	0
1	1
2	2
3	-1
4	-24
5	-123
6	2
7	5987
8	54544
9	66441
10	-4948798
11	-71261177
12	-226393992
13	9534896269
14	201964922434
15	1166083278955
16	-34861258001632
17	-1052810665903343
18	-9456771887276926
19	211545075206125327

[0,1,2,-1,-24,-123,2,5987,54544,66441,-4948798, -71261177,-226393992,9534896269,201964922434, 1166083278955,-34861258001632,-1052810665903343, -9456771887276926,211545075206125327]