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A141049 as a simple table

na(n)
21
32
43
532
6138
74080
859524
94687776
10225124336
1151271450616
128343603385400
135906858359525200
143340333500963917624
157785349019265044794432

[1,2,3,32,138,4080,59524,4687776,225124336,
 51271450616,8343603385400,5906858359525200,
 3340333500963917624,7785349019265044794432]