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 | 3 |
| 2 | 18 |
| 3 | 108 |
| 4 | 1053 |
| 5 | 10206 |
| 6 | 100602 |
| 7 | 1001646 |
| 8 | 10005525 |
| 9 | 100009323 |
| 10 | 1000053864 |
| 11 | 10000125297 |
| 12 | 100000190088 |
| 13 | 1000000837998 |
| 14 | 10000002002688 |
| 15 | 100000000895004 |
| 16 | 1000000037647854 |
| 17 | 10000000032104772 |
| 18 | 100000000321047720 |