A009654 - OEIS

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A009654 as a simple table

n	a(n)
0	0
1	1
2	-3
3	10
4	-60
5	535
6	-5545
7	65182
8	-880992
9	13534757
10	-231683143
11	4360580794
12	-89533557212
13	1992568741579
14	-47774231187709
15	1227455840670542
16	-33641659053337888
17	979722562830640169
18	-30211554791018748267

[0,1,-3,10,-60,535,-5545,65182,-880992,13534757, -231683143,4360580794,-89533557212,1992568741579, -47774231187709,1227455840670542, -33641659053337888,979722562830640169, -30211554791018748267]