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A111596 as a simple table

na(n)
01
10
21
30
4-2
51
60
76
8-6
91
100
11-24
1236
13-12
141
150
16120
17-240
18120
19-20
201
210
22-720
231800
24-1200
25300
26-30
271
280
295040
30-15120
3112600
32-4200
33630
34-42
351
360
37-40320
38141120
39-141120
4058800
41-11760
421176
43-56
441
450
46362880
47-1451520
481693440
49-846720
50211680
51-28224
522016
53-72
541

[1,0,1,0,-2,1,0,6,-6,1,0,-24,36,-12,1,0,120,-240,
 120,-20,1,0,-720,1800,-1200,300,-30,1,0,5040,
 -15120,12600,-4200,630,-42,1,0,-40320,141120,
 -141120,58800,-11760,1176,-56,1,0,362880,-1451520,
 1693440,-846720,211680,-28224,2016,-72,1]