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A136668 as a simple table

na(n)
11
20
31
4-2
50
62
70
8-11
90
108
118
120
13-74
140
1548
160
17119
180
19-632
200
21384
22-48
230
241634
250
26-6608
270
283840
290
30-1409
310
3224032
330
34-81984
350
3646080
37384
380
39-32798
400
41389312
420
43-1178496
440
45645120
460
4718825
480
49-741056
500
516966848
520
53-19270656
540
5510321920

[1,0,1,-2,0,2,0,-11,0,8,8,0,-74,0,48,0,119,0,-632,
 0,384,-48,0,1634,0,-6608,0,3840,0,-1409,0,24032,0,
 -81984,0,46080,384,0,-32798,0,389312,0,-1178496,0,
 645120,0,18825,0,-741056,0,6966848,0,-19270656,0,
 10321920]