A055617 - OEIS

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A055617 as a simple table

n	a(n)
1	990100
2	999900010000
3	999999000001000000
4	999999990000000100000000
5	999999999900000000010000000000
6	999999999999000000000001000000000000
7	999999999999990000000000000100000000000000

[990100,999900010000,999999000001000000, 999999990000000100000000, 999999999900000000010000000000, 999999999999000000000001000000000000, 999999999999990000000000000100000000000000]