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 | 435 |
| 2 | 1113 |
| 3 | 2902 |
| 4 | 7596 |
| 5 | 19834 |
| 6 | 51440 |
| 7 | 131950 |
| 8 | 339564 |
| 9 | 876777 |
| 10 | 2267261 |
| 11 | 5864274 |
| 12 | 15159987 |
| 13 | 39161060 |
| 14 | 101136977 |
| 15 | 261240954 |
| 16 | 674934552 |
| 17 | 1743897567 |
| 18 | 4505828919 |
| 19 | 11641402990 |
| 20 | 30075908053 |
| 21 | 77701600604 |
| 22 | 200746256554 |
| 23 | 518645274018 |