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 | 121 |
| 2 | 603 |
| 3 | 2928 |
| 4 | 10505 |
| 5 | 37642 |
| 6 | 111578 |
| 7 | 330509 |
| 8 | 863435 |
| 9 | 2254026 |
| 10 | 5394662 |
| 11 | 12906149 |
| 12 | 29037224 |
| 13 | 65337510 |
| 14 | 140736855 |
| 15 | 303340170 |
| 16 | 634000207 |
| 17 | 1326522462 |
| 18 | 2717180447 |
| 19 | 5573314419 |
| 20 | 11270539628 |
| 21 | 22825534613 |
| 22 | 45808619416 |
| 23 | 92067615036 |
| 24 | 184020632660 |