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A221095 as a simple table

na(n)
01
11
24
315
4104
5750
67254
774214
8914528
912202632
10183781080
112974435200
1252965004872
131006137926040
1420652503811744
15449786292039000
1610452618371303040
17256326394027746240
186648055804021356864
19181094856954089764032
205184169133931737988480

[1,1,4,15,104,750,7254,74214,914528,12202632,
 183781080,2974435200,52965004872,1006137926040,
 20652503811744,449786292039000,10452618371303040,
 256326394027746240,6648055804021356864,
 181094856954089764032,5184169133931737988480]