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A373660 as a simple table

na(n)
01
12
2-1
36
4-6
51
630
7-42
815
9-1
10190
11-340
12186
13-32
141
151547
16-3355
172460
18-700
1965
20-1
2115106
22-38430
2335295
24-14140
252355
26-126
271
28173502
29-506114
30558285
31-289520
3271295
33-7413
34238
35-1
362286648
37-7520040
389681700
39-6174224
402033920
41-328384
4222204
43-440
441

[1,2,-1,6,-6,1,30,-42,15,-1,190,-340,186,-32,1,
 1547,-3355,2460,-700,65,-1,15106,-38430,35295,
 -14140,2355,-126,1,173502,-506114,558285,-289520,
 71295,-7413,238,-1,2286648,-7520040,9681700,
 -6174224,2033920,-328384,22204,-440,1]