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 | 5 |
| 3 | 24 |
| 4 | 83 |
| 5 | 263 |
| 6 | 776 |
| 7 | 2201 |
| 8 | 6077 |
| 9 | 16488 |
| 10 | 44211 |
| 11 | 117615 |
| 12 | 311232 |
| 13 | 820641 |
| 14 | 2158645 |
| 15 | 5669096 |
| 16 | 14872483 |
| 17 | 38989367 |
| 18 | 102165928 |
| 19 | 267628569 |
| 20 | 700924525 |
| 21 | 1835493016 |
| 22 | 4806144675 |
| 23 | 12583939679 |
| 24 | 32947361088 |
| 25 | 86260987393 |
| 26 | 225840387941 |