This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 83 |
| 3 | 0 |
| 4 | 887 |
| 5 | 811 |
| 6 | 88813 |
| 7 | 88817 |
| 8 | 8819 |
| 9 | 823 |
| 10 | 829 |
| 11 | 8831 |
| 12 | 8837 |
| 13 | 88888841 |
| 14 | 88843 |
| 15 | 88888888888888888888888888888847 |
| 16 | 853 |
| 17 | 859 |
| 18 | 8861 |
| 19 | 8867 |
| 20 | 888871 |
| 21 | 88873 |
| 22 | 88888879 |
| 23 | 883 |
| 24 | 88888888888889 |
| 25 | 88897 |
| 26 | 8101 |
| 27 | 888103 |
| 28 | 8888107 |
| 29 | 888109 |