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 | 0 |
| 1 | 1 |
| 2 | 11 |
| 3 | 144 |
| 4 | 1859 |
| 5 | 24025 |
| 6 | 310464 |
| 7 | 4012009 |
| 8 | 51845651 |
| 9 | 669981456 |
| 10 | 8657913275 |
| 11 | 111882891121 |
| 12 | 1445819671296 |
| 13 | 18683772835729 |
| 14 | 241443227193179 |
| 15 | 3120078180675600 |
| 16 | 40319573121589619 |
| 17 | 521034372399989449 |