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A280612 as a simple table

na(n)
01
10
21
31100
4101
5110010
61
711110100
810001
91111000100
1010001
11111111000100
121010101
1311111100101010
1410001
151111111101000100
16100010101
17111111110001001010
18100000001
1911111111110001111100
2010100000001
211111111111001001111100
221000101

[1,0,1,1100,101,110010,1,11110100,10001,
 1111000100,10001,111111000100,1010101,
 11111100101010,10001,1111111101000100,100010101,
 111111110001001010,100000001,11111111110001111100,
 10100000001,1111111111001001111100,1000101]