A131306 - OEIS

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A131306 as a simple table

n	a(n)
1	2
2	11
3	1777
4	23333
5	199999
6	2999999
7	19999999
8	577777777
9	1777777777
10	23333333333
11	311111111111
12	2111111111111
13	17777777777777
14	499999999999999
15	1333333333333333
16	23333333333333333

[2,11,1777,23333,199999,2999999,19999999, 577777777,1777777777,23333333333,311111111111, 2111111111111,17777777777777,499999999999999, 1333333333333333,23333333333333333]