A083933 - OEIS

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A083933 as a simple table

n	a(n)
0	0
1	1100
2	11001100
3	11110000
4	110011001100
5	110011110000
6	111100001100
7	111100110000
8	111111000000
9	1100110011001100
10	1100110011110000
11	1100111100001100
12	1100111100110000
13	1100111111000000
14	1111000011001100

[0,1100,11001100,11110000,110011001100, 110011110000,111100001100,111100110000, 111111000000,1100110011001100,1100110011110000, 1100111100001100,1100111100110000, 1100111111000000,1111000011001100]