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A281748 as a simple table

na(n)
01
11
2111
3100
411101
510111
61110100
71010101
8111010111
9101110100
1011101010101
1110101110111
121110101010100
131011101110101
14111010101010111
15101011101110100
1611101010101010101
1710111010101110111
181110101010101010100
191010111010101110101

[1,1,111,100,11101,10111,1110100,1010101,
 111010111,101110100,11101010101,10101110111,
 1110101010100,1011101110101,111010101010111,
 101011101110100,11101010101010101,
 10111010101110111,1110101010101010100,
 1010111010101110101]