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A281872 as a simple table

na(n)
01
11
21
33
48
524
674
7238
8786
92646
109071
1131536
12110967
13394420
141414053
155107523
1618568628
1767894564
18249513890
19921134164
203414439996
2112703212213
2247419589969
23177551521838
24666655929561
252509526456940
269469082269965
2735807434636137
28135681047696427

[1,1,1,3,8,24,74,238,786,2646,9071,31536,110967,
 394420,1414053,5107523,18568628,67894564,
 249513890,921134164,3414439996,12703212213,
 47419589969,177551521838,666655929561,
 2509526456940,9469082269965,35807434636137,
 135681047696427]