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A121757 as a simple table

na(n)
01
11
22
31
44
56
61
76
818
924
101
118
1236
1396
14120
151
1610
1760
18240
19600
20720
211
2212
2390
24480
251800
264320
275040
281
2914
30126
31840
324200
3315120
3435280
3540320
361
3716
38168
391344
408400
4140320
42141120
43322560
44362880
451
4618
47216
482016
4915120
5090720
51423360
521451520

[1,1,2,1,4,6,1,6,18,24,1,8,36,96,120,1,10,60,240,
 600,720,1,12,90,480,1800,4320,5040,1,14,126,840,
 4200,15120,35280,40320,1,16,168,1344,8400,40320,
 141120,322560,362880,1,18,216,2016,15120,90720,
 423360,1451520]