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A306364 as a simple table

na(n)
21
33
412
53
660
745
8360
9540
1045
112520
126300
131575
1420160
1575600
1637800
171575
18181440
19952560
20793800
2199225
221814400
2312700800
2415876000
253969000
2699225
2719958400
28179625600
29314344800
30130977000
319823275

[1,3,12,3,60,45,360,540,45,2520,6300,1575,20160,
 75600,37800,1575,181440,952560,793800,99225,
 1814400,12700800,15876000,3969000,99225,19958400,
 179625600,314344800,130977000,9823275]