A138144 - OEIS

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A138144 as a simple table

n	a(n)
1	1
2	11
3	111
4	1111
5	11011
6	110011
7	1100011
8	11000011
9	110000011
10	1100000011
11	11000000011
12	110000000011
13	1100000000011
14	11000000000011
15	110000000000011
16	1100000000000011
17	11000000000000011
18	110000000000000011

[1,11,111,1111,11011,110011,1100011,11000011, 110000011,1100000011,11000000011,110000000011, 1100000000011,11000000000011,110000000000011, 1100000000000011,11000000000000011, 110000000000000011]