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 | 2 |
| 1 | 13 |
| 2 | 102 |
| 3 | 803 |
| 4 | 6322 |
| 5 | 49773 |
| 6 | 391862 |
| 7 | 3085123 |
| 8 | 24289122 |
| 9 | 191227853 |
| 10 | 1505533702 |
| 11 | 11853041763 |
| 12 | 93318800402 |
| 13 | 734697361453 |
| 14 | 5784260091222 |
| 15 | 45539383368323 |
| 16 | 358530806855362 |
| 17 | 2822707071474573 |
| 18 | 22223125764941222 |