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A137520 as a simple table

na(n)
1-5
20
3-5
40
50
6-5
70
80
90
10-5
11-256
120
130
140
15-5
160
17-1280
180
190
200
21-5
220
230
24-3840
250
260
270
28-5
290
300
310
32-8960
330
340
350
36-5
37-645120
380
390
400
41-17920
420
430
440
45-5
460
47-5806080
480
490
500
51-32256
520
530
540
55-5
560
570
58-29030400
590
600
610
62-53760
630
640
650
66-5

[-5,0,-5,0,0,-5,0,0,0,-5,-256,0,0,0,-5,0,-1280,0,
 0,0,-5,0,0,-3840,0,0,0,-5,0,0,0,-8960,0,0,0,-5,
 -645120,0,0,0,-17920,0,0,0,-5,0,-5806080,0,0,0,
 -32256,0,0,0,-5,0,0,-29030400,0,0,0,-53760,0,0,0,
 -5]