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 | 8 |
| 2 | 76 |
| 3 | 800 |
| 4 | 8990 |
| 5 | 105672 |
| 6 | 1283464 |
| 7 | 15981504 |
| 8 | 202927725 |
| 9 | 2617624680 |
| 10 | 34206162848 |
| 11 | 451872681728 |
| 12 | 6024664312030 |
| 13 | 80964348872400 |
| 14 | 1095590286231120 |
| 15 | 14915165412813184 |
| 16 | 204140673966231870 |
| 17 | 2807362363541687280 |
| 18 | 38772186055550141700 |