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 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 13 |
| 5 | 16 |
| 6 | 31 |
| 7 | 131 |
| 8 | 231 |
| 9 | 578 |
| 10 | 905 |
| 11 | 1649 |
| 12 | 4810 |
| 13 | 5999 |
| 14 | 10249 |
| 15 | 11962 |
| 16 | 21338 |
| 17 | 229345 |
| 18 | 404066 |
| 19 | 772217 |
| 20 | 1646462 |
| 21 | 2129025 |
| 22 | 235494066 |
| 23 | 559730937 |
| 24 | 1287457726 |
| 25 | 1549953698 |
| 26 | 2919657850 |
| 27 | 23892156516 |
| 28 | 52085560558 |
| 29 | 70347157214 |