Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 73 |
3 | 0 |
4 | 0 |
5 | 77711 |
6 | 77713 |
7 | 7717 |
8 | 719 |
9 | 7723 |
10 | 77777777777777777729 |
11 | 77731 |
12 | 777737 |
13 | 7741 |
14 | 743 |
15 | 77747 |
16 | 7753 |
17 | 7759 |
18 | 761 |
19 | 77777777767 |
20 | 7777777777771 |
21 | 773 |
22 | 777777777777777777777777777777777777777777777777777777777777777779 |
[0,73,0,0,77711,77713,7717,719,7723, 77777777777777777729,77731,777737,7741,743,77747, 7753,7759,761,77777777767,7777777777771,773, 77777777777777777777777777777777777777777777777777\ 7777777777777779] |