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A115781 as a simple table

na(n)
11111
211110
311111
4101101
5101111
6111100
7111101
8111110
9111111
101011010
111011110
121011111
131111000
141111010
151111100
161111101
171111110
181111111
1910100101
2010101101
2110101111
2210110100
2310110101
2410111100
2510111101

[1111,11110,11111,101101,101111,111100,111101,
 111110,111111,1011010,1011110,1011111,1111000,
 1111010,1111100,1111101,1111110,1111111,10100101,
 10101101,10101111,10110100,10110101,10111100,
 10111101]