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A279985 as a simple table

na(n)
01
111
211
3111
41011
510111
6111011
71010111
811001011
9111110111
101000111011
111011010111
12100111001011
13111011110111
1411010100111011
15110100111010111
161100111011001011
1711111011111110111
18100011100000111011
191111101111011010111
2010001010010111001011

[1,11,11,111,1011,10111,111011,1010111,11001011,
 111110111,1000111011,1011010111,100111001011,
 111011110111,11010100111011,110100111010111,
 1100111011001011,11111011111110111,
 100011100000111011,1111101111011010111,
 10001010010111001011]