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A019988 as a simple table

na(n)
11
22
35
416
555
6222
7950
84265
919591
1091678
11434005
122073783
139979772
1448315186
15235088794
161148891118
175636168859
1827743309673

[1,2,5,16,55,222,950,4265,19591,91678,434005,
 2073783,9979772,48315186,235088794,1148891118,
 5636168859,27743309673]