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 | 6 |
| 2 | 66 |
| 3 | 666 |
| 4 | 8778 |
| 5 | 66066 |
| 6 | 828828 |
| 7 | 6295926 |
| 8 | 61477416 |
| 9 | 178727871 |
| 10 | 6172882716 |
| 11 | 87350505378 |
| 12 | 0 |
| 13 | 68742000024786 |
| 14 | 82078700787028 |
| 15 | 684866959668486 |
| 16 | 8208268228628028 |
| 17 | 67898244444289876 |
| 18 | 514816979979618415 |