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A267688 as a simple table

na(n)
01
1110
211100
31111010
4111110100
511111101010
61111111010100
7111111110101010
811111111101010100
91111111111010101010
10111111111110101010100
1111111111111101010101010
121111111111111010101010100
13111111111111110101010101010
1411111111111111101010101010100

[1,110,11100,1111010,111110100,11111101010,
 1111111010100,111111110101010,11111111101010100,
 1111111111010101010,111111111110101010100,
 11111111111101010101010,1111111111111010101010100,
 111111111111110101010101010,
 11111111111111101010101010100]