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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 14 |
| 5 | 33 |
| 6 | 65 |
| 7 | 238 |
| 8 | 627 |
| 9 | 1495 |
| 10 | 6902 |
| 11 | 19437 |
| 12 | 55315 |
| 13 | 282982 |
| 14 | 835791 |
| 15 | 2599805 |
| 16 | 14998046 |
| 17 | 49311669 |
| 18 | 158588105 |
| 19 | 1004869082 |
| 20 | 3501128499 |
| 21 | 11576931665 |
| 22 | 79384657478 |
| 23 | 290593665417 |
| 24 | 1030346918185 |
| 25 | 7700311775366 |
| 26 | 29349960207117 |