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A020110 as a simple table

na(n)
01
11
22
34
415
570
6401
72715
821116
9185346
101812264
1119532171
12230045569
132939471158
1440499380397
15598490843643
169442855533027
17158430131720784
182816535675036147
1952888281009012093
201046012668844905827

[1,1,2,4,15,70,401,2715,21116,185346,1812264,
 19532171,230045569,2939471158,40499380397,
 598490843643,9442855533027,158430131720784,
 2816535675036147,52888281009012093,
 1046012668844905827]