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A080317 as a simple table

na(n)
00
11100
211001100
311110000
4110011001100
5110011110000
6111111000000
7111100001100
8111100110000
91100110011001100
101100110011110000
111100111111000000
121100111100001100
131100111100110000
141111110000001100

[0,1100,11001100,11110000,110011001100,
 110011110000,111111000000,111100001100,
 111100110000,1100110011001100,1100110011110000,
 1100111111000000,1100111100001100,
 1100111100110000,1111110000001100]