A068186 - OEIS

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A068186 as a simple table

n	a(n)
2	22
3	333
4	22222222
5	55555
6	333333222222
7	7777777
8	222222222222222222222222
9	333333333333333333
10	55555555552222222222
11	0
12	333333333333222222222222222222222222
13	0
14	7777777777777722222222222222

[22,333,22222222,55555,333333222222,7777777, 222222222222222222222222,333333333333333333, 55555555552222222222,0, 333333333333222222222222222222222222,0, 7777777777777722222222222222]