A113999 - OEIS

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A113999 as a simple table

n	a(n)
1	1
2	11
3	101
4	1011
5	10001
6	100111
7	1000001
8	10001011
9	100000101
10	1000010011
11	10000000001
12	100000101111
13	1000000000001
14	10000001000011
15	100000000010101
16	1000000010001011
17	10000000000000001
18	100000000100100111

[1,11,101,1011,10001,100111,1000001,10001011, 100000101,1000010011,10000000001,100000101111, 1000000000001,10000001000011,100000000010101, 1000000010001011,10000000000000001, 100000000100100111]