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 | 12 |
| 2 | 287 |
| 3 | 6876 |
| 4 | 164737 |
| 5 | 3946812 |
| 6 | 94558751 |
| 7 | 2265463212 |
| 8 | 54276558337 |
| 9 | 1300371936876 |
| 10 | 31154649926687 |
| 11 | 746411226303612 |
| 12 | 17882714781360001 |
| 13 | 428438743526336412 |
| 14 | 10264647129850713887 |
| 15 | 245923092372890796876 |