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A145548 as a simple table

na(n)
11
21
32
44
59
620
748
8115
9286
10719
111842
124765
1312482
1432957
1587756
16235198
17634261
181719312
194682952
2012808650
2135168306
2296893138
23267794711
24742260014
252062792103

[1,1,2,4,9,20,48,115,286,719,1842,4765,12482,
 32957,87756,235198,634261,1719312,4682952,
 12808650,35168306,96893138,267794711,742260014,
 2062792103]