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 | 2 |
| 3 | 5 |
| 4 | 13 |
| 5 | 33 |
| 6 | 82 |
| 7 | 202 |
| 8 | 497 |
| 9 | 1224 |
| 10 | 3017 |
| 11 | 7439 |
| 12 | 18343 |
| 13 | 45228 |
| 14 | 111514 |
| 15 | 274945 |
| 16 | 677894 |
| 17 | 1671393 |
| 18 | 4120937 |
| 19 | 10160465 |
| 20 | 25051354 |
| 21 | 61765902 |
| 22 | 152288233 |
| 23 | 375477484 |
| 24 | 925766477 |
| 25 | 2282543187 |
| 26 | 5627772815 |
| 27 | 13875674756 |
| 28 | 34211464510 |
| 29 | 84350802705 |