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A145550 as a simple table

na(n)
11
21
32
44
59
620
748
8115
9286
10719
111842
124766
1312486
1432972
1587807
16235365
17634792
181720976
194688090
2012824381
2135216108
2297037603
23268229329
24743562936
252066686470
265758171390
2716079351152

[1,1,2,4,9,20,48,115,286,719,1842,4766,12486,
 32972,87807,235365,634792,1720976,4688090,
 12824381,35216108,97037603,268229329,743562936,
 2066686470,5758171390,16079351152]