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A266670 as a simple table

na(n)
01
111
21000
31011111
41000000
511011111111
61000000000
7111011111111111
81000000000000
91111011111111111111
101000000000000000
1111111011111111111111111
121000000000000000000
13111111011111111111111111111
141000000000000000000000
151111111011111111111111111111111

[1,11,1000,1011111,1000000,11011111111,1000000000,
 111011111111111,1000000000000,1111011111111111111,
 1000000000000000,11111011111111111111111,
 1000000000000000000,111111011111111111111111111,
 1000000000000000000000,
 1111111011111111111111111111111]