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A158978 as a simple table

na(n)
11
21
31
41
54
61
724
86
9192
10432
1117280
1210
13207360
1451840
15322560
161360800
17696729600
183225600
1912541132800
2039191040
2127869184000
221316818944000
23115880067072000
24349272000
252781121609728000
2617382010060800000

[1,1,1,1,4,1,24,6,192,432,17280,10,207360,51840,
 322560,1360800,696729600,3225600,12541132800,
 39191040,27869184000,1316818944000,
 115880067072000,349272000,2781121609728000,
 17382010060800000]