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A338143 as a simple table

na(n)
11
21
34
46
53
61
7142
811682
9310536
103460725
1119870590
1265886660
13133585200
14168399000
15128898000
1654885600
179979200
181
1911251320
204825713121719
2148019143606137456
2260392840368910627325

[1,1,4,6,3,1,142,11682,310536,3460725,19870590,
 65886660,133585200,168399000,128898000,54885600,
 9979200,1,11251320,4825713121719,
 48019143606137456,60392840368910627325]