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 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 12 |
| 8 | 25 |
| 9 | 52 |
| 10 | 113 |
| 11 | 247 |
| 12 | 548 |
| 13 | 1226 |
| 14 | 2770 |
| 15 | 6298 |
| 16 | 14419 |
| 17 | 33183 |
| 18 | 76760 |
| 19 | 178327 |
| 20 | 415960 |
| 21 | 973693 |
| 22 | 2286781 |
| 23 | 5386573 |
| 24 | 12723097 |
| 25 | 30127465 |
| 26 | 71506140 |
| 27 | 170081575 |
| 28 | 405359177 |
| 29 | 967899981 |
| 30 | 2315131955 |
| 31 | 5546597838 |
| 32 | 13308818691 |
| 33 | 31979667219 |
| 34 | 76947325788 |