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A033643 as a simple table

na(n)
01
11
22
36
424
5120
624
7144
8312
91080
104632
1124240
129264
1357744
14134016
15517536
162338176
1712725952
187014528
1945192384
20111428352
21469862208
222213733888
2312478256064
248854935552
2558767959808
26152955661824
27693938824704

[1,1,2,6,24,120,24,144,312,1080,4632,24240,9264,
 57744,134016,517536,2338176,12725952,7014528,
 45192384,111428352,469862208,2213733888,
 12478256064,8854935552,58767959808,152955661824,
 693938824704]