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A118708 as a simple table

na(n)
01
11
2-2
31
4-8
512
61
7-38
8252
9-360
101
11-248
128232
13-53280
1475600
151
16-2558
17581112
18-19069200
19123152400
20-174636000
211
22-32588
2377397852
24-17469862560
25572771228400
26-3698441208000
275244319080000
281
29-543098
3016713897732
31-39529847287080
328919112306734000
33-292409138251692000
341888096465415160000
35-2677277333530800000

[1,1,-2,1,-8,12,1,-38,252,-360,1,-248,8232,-53280,
 75600,1,-2558,581112,-19069200,123152400,
 -174636000,1,-32588,77397852,-17469862560,
 572771228400,-3698441208000,5244319080000,1,
 -543098,16713897732,-39529847287080,
 8919112306734000,-292409138251692000,
 1888096465415160000,-2677277333530800000]