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A281219 as a simple table

na(n)
01
10
2110
3101
410100
510011
61001000
7100111
8110110000
9111101111
1010001100000
111001011111
121101101000000
131111100111111
14100000010000000
1511111001111111
1611100011100000000
1710001011111111
181111011101000000000
1911101100111111111
20110000101110000000000

[1,0,110,101,10100,10011,1001000,100111,110110000,
 111101111,10001100000,1001011111,1101101000000,
 1111100111111,100000010000000,11111001111111,
 11100011100000000,10001011111111,
 1111011101000000000,11101100111111111,
 110000101110000000000]