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A118240 as a simple table

na(n)
00
11
21
310
411
5101
6111
71010
81011
91101
101110
111111
1210101
1310111
1411010
1511011
1611101
1711111
18101010
19101011
20101101
21101110
22101111
23110101
24110111
25111010
26111011
27111101
28111110
29111111
301010101
311010111
321011010
331011011
341011101

[0,1,1,10,11,101,111,1010,1011,1101,1110,1111,
 10101,10111,11010,11011,11101,11111,101010,101011,
 101101,101110,101111,110101,110111,111010,111011,
 111101,111110,111111,1010101,1010111,1011010,
 1011011,1011101]