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 | 8 |
| 3 | 9 |
| 4 | 129 |
| 5 | 318 |
| 6 | 1008 |
| 7 | 2843 |
| 8 | 8988 |
| 9 | 38439 |
| 10 | 121089 |
| 11 | 42708 |
| 12 | 88208 |
| 13 | 2034819 |
| 14 | 1749819 |
| 15 | 2235879 |
| 16 | 104271309 |
| 17 | 447194784 |
| 18 | 1234742858 |
| 19 | 2234186964 |
| 20 | 3266133123 |
| 21 | 22172578524 |
| 22 | 114481278033 |
| 23 | 204796672749 |
| 24 | 841526085621 |
| 25 | 355055477499 |