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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 19 |
| 7 | 44 |
| 8 | 96 |
| 9 | 220 |
| 10 | 489 |
| 11 | 1115 |
| 12 | 2483 |
| 13 | 5646 |
| 14 | 12571 |
| 15 | 28343 |
| 16 | 63152 |
| 17 | 141621 |
| 18 | 314330 |
| 19 | 701327 |
| 20 | 1552149 |
| 21 | 3445128 |
| 22 | 7599990 |
| 23 | 16789039 |
| 24 | 36908077 |