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 | 72 |
| 3 | 648 |
| 4 | 5832 |
| 5 | 52488 |
| 6 | 472392 |
| 7 | 4251528 |
| 8 | 38263752 |
| 9 | 344373768 |
| 10 | 3099363912 |
| 11 | 27894275208 |
| 12 | 251048476872 |
| 13 | 2259436291848 |
| 14 | 20334926626632 |
| 15 | 183014339639688 |
| 16 | 1647129056757192 |
| 17 | 14824161510814728 |
| 18 | 133417453597332552 |
| 19 | 1200757082375992968 |
| 20 | 10806813741383936712 |
| 21 | 97261323672455430408 |
| 22 | 875351913052098873672 |