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A280973 as a simple table

na(n)
01
10
21
31100
41
5111100
61
711111100
81001
91111101000
1011011
11111111000100
1210001
1311111111000100
1410101
151111111111011010
1610100101
17111111111001000110
1810001
1911111111111111000100
201110010101
211111111111100100011110
22101001101
23111111111111110010000010

[1,0,1,1100,1,111100,1,11111100,1001,1111101000,
 11011,111111000100,10001,11111111000100,10101,
 1111111111011010,10100101,111111111001000110,
 10001,11111111111111000100,1110010101,
 1111111111100100011110,101001101,
 111111111111110010000010]