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 | 4 |
| 2 | 24 |
| 3 | 186 |
| 4 | 1736 |
| 5 | 18754 |
| 6 | 228658 |
| 7 | 3092316 |
| 8 | 45802294 |
| 9 | 735881882 |
| 10 | 12727541778 |
| 11 | 235515880084 |
| 12 | 4638914346322 |
| 13 | 96840935881898 |
| 14 | 2134717733185118 |
| 15 | 49529467079270060 |
| 16 | 1206148832249659798 |
| 17 | 30751284267472226682 |