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A043520 as a simple table

n a(n)
1 7777
2 17777
3 27777
4 37777
5 47777
6 57777
7 67777
8 70777
9 71777
10 72777
11 73777
12 74777
13 75777
14 76777
15 77077
16 77177
17 77277
18 77377
19 77477
20 77577
21 77677
22 77707
23 77717
24 77727
25 77737
26 77747
27 77757
28 77767
29 77770
30 77771
31 77772

[7777,17777,27777,37777,47777,57777,67777,70777,
 71777,72777,73777,74777,75777,76777,77077,77177,
 77277,77377,77477,77577,77677,77707,77717,77727,
 77737,77747,77757,77767,77770,77771,77772]

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Last modified September 18 15:44 EDT 2021. Contains 347527 sequences. (Running on oeis4.)