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A281523 as a simple table

na(n)
01
111
21
3111
410001
5111111
61001
7111111
810100001
91111101111
10101001
1111111111
121000100001
13111111101111
1410010000101001
151111110011111111
1611000100001
171001011101111
18111111010101001
1910000001111111111
201110000101000100001
21100010111111011101111

[1,11,1,111,10001,111111,1001,111111,10100001,
 1111101111,101001,11111111,1000100001,
 111111101111,10010000101001,1111110011111111,
 11000100001,1001011101111,111111010101001,
 10000001111111111,1110000101000100001,
 100010111111011101111]