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A137478 as a simple table

na(n)
11
21
31
42
54
61
76
818
99
101
1130
12120
1390
1420
151
16240
171200
181200
19400
2040
211
223120
2318720
2423400
2510400
261560
2778
281
2965520
30458640
31687960
32382200
3376440
345733
35147
361
372227680
3817821440
3931187520
4020791680
415197920
42519792
4319992
44272
451

[1,1,1,2,4,1,6,18,9,1,30,120,90,20,1,240,1200,
 1200,400,40,1,3120,18720,23400,10400,1560,78,1,
 65520,458640,687960,382200,76440,5733,147,1,
 2227680,17821440,31187520,20791680,5197920,519792,
 19992,272,1]