A099638 - OEIS

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A099638 as a simple table

n	a(n)
1	1
2	77
3	7437
4	741037
5	74077037
6	7407437037
7	740741037037
8	74074077037037
9	7407407437037037
10	740740741037037037
11	74074074077037037037
12	7407407407437037037037
13	740740740741037037037037

[1,77,7437,741037,74077037,7407437037, 740741037037,74074077037037,7407407437037037, 740740741037037037,74074074077037037037, 7407407407437037037037,740740740741037037037037]