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A287911 as a simple table

na(n)
01
11
2110
3111
410100
511111
61011000
71111111
8111010000
9111111111
1011001100000
1111111111111
121111101000000
131111111111111
14111100110000000
15111111111111111
1611110010100000000
1711111111111111111
181111110011000000000
191111111111111111111

[1,1,110,111,10100,11111,1011000,1111111,
 111010000,111111111,11001100000,11111111111,
 1111101000000,1111111111111,111100110000000,
 111111111111111,11110010100000000,
 11111111111111111,1111110011000000000,
 1111111111111111111]