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 | 9 |
| 2 | 46 |
| 3 | 175 |
| 4 | 551 |
| 5 | 1517 |
| 6 | 3775 |
| 7 | 8677 |
| 8 | 18703 |
| 9 | 38223 |
| 10 | 74682 |
| 11 | 140403 |
| 12 | 255280 |
| 13 | 450734 |
| 14 | 775440 |
| 15 | 1303509 |
| 16 | 2146040 |
| 17 | 3467254 |
| 18 | 5506807 |
| 19 | 8610369 |
| 20 | 13271183 |
| 21 | 20186110 |
| 22 | 30330668 |
| 23 | 45058828 |
| 24 | 66234905 |
| 25 | 96406840 |
| 26 | 139032605 |
| 27 | 198774473 |
| 28 | 281879613 |
| 29 | 396670035 |
| 30 | 554170514 |
| 31 | 768909964 |