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A218016 as a simple table

na(n)
01
15
21
325
410
52
6125
775
830
96
10625
11500
12300
13120
1424
153125
163125
172500
181500
19600
20120
2115625
2218750
2318750
2415000
259000
263600
27720
2878125
29109375
30131250
31131250
32105000
3363000
3425200
355040
36390625
37625000
38875000
391050000
401050000
41840000
42504000
43201600
4440320

[1,5,1,25,10,2,125,75,30,6,625,500,300,120,24,
 3125,3125,2500,1500,600,120,15625,18750,18750,
 15000,9000,3600,720,78125,109375,131250,131250,
 105000,63000,25200,5040,390625,625000,875000,
 1050000,1050000,840000,504000,201600,40320]