A093139 - OEIS

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A093139 as a simple table

n	a(n)
1	7
2	17
3	1117
4	11117
5	11111117
6	11111111111111111111117
7	11111111111111111111111111117
8	1111111111111111111111111111111111111117

[7,17,1117,11117,11111117,11111111111111111111117, 11111111111111111111111111117, 1111111111111111111111111111111111111117]