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A109915 as a simple table

na(n)
11
21
34
41
56
61
7720
890
910
101
1112
121
133360
14240
1516
161
1718
181
199240
20462
2122
221
2311793600
24491400
2519656
26756
2728
281
2930
301
3145239040
321413720
3342840
341260
3536
361
3759280
381560
3940
401
4142
421
4391080
442070
4546
461
47311875200
486497400
49132600
502652

[1,1,4,1,6,1,720,90,10,1,12,1,3360,240,16,1,18,1,
 9240,462,22,1,11793600,491400,19656,756,28,1,30,1,
 45239040,1413720,42840,1260,36,1,59280,1560,40,1,
 42,1,91080,2070,46,1,311875200,6497400,132600,
 2652]