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A101680 as a simple table

na(n)
01
111
2111
31011
410111
5111011
61100111
710001011
8100010111
91100111011
1011101100111
11101110001011
121011000010111
1311100000111011
14110000001100111
151000000010001011
1610000000100010111
17110000001100111011

[1,11,111,1011,10111,111011,1100111,10001011,
 100010111,1100111011,11101100111,101110001011,
 1011000010111,11100000111011,110000001100111,
 1000000010001011,10000000100010111,
 110000001100111011]