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A332174 as a simple table

n a(n)
0 4
1 747
2 77477
3 7774777
4 777747777
5 77777477777
6 7777774777777
7 777777747777777
8 77777777477777777
9 7777777774777777777
10 777777777747777777777
11 77777777777477777777777
12 7777777777774777777777777
13 777777777777747777777777777
14 77777777777777477777777777777
15 7777777777777774777777777777777 

[4,747,77477,7774777,777747777,77777477777,
 7777774777777,777777747777777,77777777477777777,
 7777777774777777777,777777777747777777777,
 77777777777477777777777,7777777777774777777777777,
 777777777777747777777777777,
 77777777777777477777777777777,
 7777777777777774777777777777777]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)