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A155794 as a simple table

na(n)
01
11
21
31
41
51
61
72
82
91
101
116
1224
136
141
151
1624
17720
18720
1924
201
211
22120
2340320
24362880
2540320
26120
271
281
29720
303628800
31479001600
32479001600
333628800
34720
351
361
375040
38479001600
391307674368000
4020922789888000
411307674368000
42479001600
435040
441

[1,1,1,1,1,1,1,2,2,1,1,6,24,6,1,1,24,720,720,24,1,
 1,120,40320,362880,40320,120,1,1,720,3628800,
 479001600,479001600,3628800,720,1,1,5040,
 479001600,1307674368000,20922789888000,
 1307674368000,479001600,5040,1]