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A143906 as a simple table

na(n)
11001
210011001
310100101
411000011
5100011110001
6100101101001
7100110011001
8101001100101
9101010010101
10101100001101
11110001100011
12110010010011
13110100001011
14111000000111
151000011111100001
161000101111010001

[1001,10011001,10100101,11000011,100011110001,
 100101101001,100110011001,101001100101,
 101010010101,101100001101,110001100011,
 110010010011,110100001011,111000000111,
 1000011111100001,1000101111010001]