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 | 29 |
| 2 | 289 |
| 3 | 1640 |
| 4 | 6604 |
| 5 | 21122 |
| 6 | 57271 |
| 7 | 137155 |
| 8 | 298184 |
| 9 | 599954 |
| 10 | 1132942 |
| 11 | 2029229 |
| 12 | 3475465 |
| 13 | 5728289 |
| 14 | 9132418 |
| 15 | 14141618 |
| 16 | 21342771 |
| 17 | 31483251 |
| 18 | 45501823 |
| 19 | 64563278 |
| 20 | 90097018 |
| 21 | 123839804 |
| 22 | 167882881 |
| 23 | 224723693 |
| 24 | 297322402 |
| 25 | 389163424 |
| 26 | 504322196 |
| 27 | 647537387 |
| 28 | 824288767 |
| 29 | 1040880947 |
| 30 | 1304533204 |