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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 18 |
| 3 | 153 |
| 4 | 1728 |
| 5 | 24315 |
| 6 | 410400 |
| 7 | 8079729 |
| 8 | 181786752 |
| 9 | 4601232243 |
| 10 | 129402385920 |
| 11 | 4003157532297 |
| 12 | 135098815002624 |
| 13 | 4939266681129963 |
| 14 | 194472450526169088 |
| 15 | 8203835046344538465 |
| 16 | 369151362125290045440 |
| 17 | 17649035213360472293091 |
| 18 | 893431062200523039178752 |