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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 17 |
| 7 | 39 |
| 8 | 89 |
| 9 | 210 |
| 10 | 498 |
| 11 | 1185 |
| 12 | 2813 |
| 13 | 6664 |
| 14 | 15707 |
| 15 | 36886 |
| 16 | 86259 |
| 17 | 201003 |
| 18 | 466788 |
| 19 | 1080825 |
| 20 | 2495565 |
| 21 | 5747664 |
| 22 | 13206253 |
| 23 | 30276788 |
| 24 | 69267205 |
| 25 | 158155198 |
| 26 | 360422113 |
| 27 | 819873747 |
| 28 | 1861732042 |
| 29 | 4220347570 |
| 30 | 9551287776 |