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 | 3 |
| 4 | 6 |
| 5 | 15 |
| 6 | 23 |
| 7 | 53 |
| 8 | 94 |
| 9 | 203 |
| 10 | 404 |
| 11 | 855 |
| 12 | 1648 |
| 13 | 3416 |
| 14 | 6662 |
| 15 | 13400 |
| 16 | 26406 |
| 17 | 53038 |
| 18 | 105306 |
| 19 | 212051 |
| 20 | 422162 |
| 21 | 849267 |
| 22 | 1696864 |
| 23 | 3406077 |
| 24 | 6807024 |
| 25 | 13642099 |
| 26 | 27268122 |
| 27 | 54576003 |
| 28 | 109096436 |
| 29 | 218250874 |
| 30 | 436243705 |
| 31 | 872533347 |
| 32 | 1744312748 |
| 33 | 3488432736 |
| 34 | 6974783481 |