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A020020 as a simple table

na(n)
01
11
21
34
415
569
6401
72715
821115
9185345
101812263
1119532171
12230045569
132939471158
1440499380397
15598490843643
169442855533027
17158430131720783
182816535675036147
1952888281009012092
201046012668844905826

[1,1,1,4,15,69,401,2715,21115,185345,1812263,
 19532171,230045569,2939471158,40499380397,
 598490843643,9442855533027,158430131720783,
 2816535675036147,52888281009012092,
 1046012668844905826]