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 | 2 |
| 2 | 9 |
| 3 | 33 |
| 4 | 101 |
| 5 | 277 |
| 6 | 709 |
| 7 | 1733 |
| 8 | 4101 |
| 9 | 9477 |
| 10 | 21509 |
| 11 | 48133 |
| 12 | 106501 |
| 13 | 233477 |
| 14 | 507909 |
| 15 | 1097733 |
| 16 | 2359301 |
| 17 | 5046277 |
| 18 | 10747909 |
| 19 | 22806533 |
| 20 | 48234501 |
| 21 | 101711877 |
| 22 | 213909509 |
| 23 | 448790533 |
| 24 | 939524101 |
| 25 | 1962934277 |
| 26 | 4093640709 |
| 27 | 8522825733 |