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 | 9 |
| 1 | 471 |
| 2 | 8268 |
| 3 | 85962 |
| 4 | 662773 |
| 5 | 4215123 |
| 6 | 23440212 |
| 7 | 118073914 |
| 8 | 551281476 |
| 9 | 2423731704 |
| 10 | 10148667670 |
| 11 | 40812739230 |
| 12 | 158644493079 |
| 13 | 599051383561 |
| 14 | 2206150654944 |
| 15 | 7949311477362 |
| 16 | 28098758599203 |
| 17 | 97645872621753 |