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A268706 as a simple table

n a(n)
1 7
2 97
3 977
4 7877
5 97777
6 787777
7 7877777
8 77777747
9 787777777
10 8777777777
11 79777777777
12 777777779777
13 7877777777777
14 77777779777777
15 778777777777777
16 8777777777777777
17 77797777777777777
18 797777777777777777
19 7777877777777777777
20 97777777777777777777 

[7,97,977,7877,97777,787777,7877777,77777747,
 787777777,8777777777,79777777777,777777779777,
 7877777777777,77777779777777,778777777777777,
 8777777777777777,77797777777777777,
 797777777777777777,7777877777777777777,
 97777777777777777777]

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Last modified April 24 17:10 EDT 2024. Contains 371962 sequences. (Running on oeis4.)