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A230051 as a simple table

na(n)
01
11
22
36
424
5120
6720
75040
840319
9362863
103628550
1139913170
12478947480
136226179960
1487164597520
151307440134000
1620918580896069
17355608034188517
186400803479701178
19121612584595293870
202432198062707745560
2151075033128533094520
221123625953230764250960

[1,1,2,6,24,120,720,5040,40319,362863,3628550,
 39913170,478947480,6226179960,87164597520,
 1307440134000,20918580896069,355608034188517,
 6400803479701178,121612584595293870,
 2432198062707745560,51075033128533094520,
 1123625953230764250960]