A143750 - OEIS

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A143750 as a simple table

n	a(n)
0	0
1	-1
2	-110
3	-111000
4	-1111000000
5	-111110000000000
6	-111111000000000000000
7	-1111111000000000000000000000
8	-111111110000000000000000000000000000
9	-111111111000000000000000000000000000000000000

[0,-1,-110,-111000,-1111000000,-111110000000000, -111111000000000000000, -1111111000000000000000000000, -111111110000000000000000000000000000, -111111111000000000000000000000000000000000000]