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 | 122 |
| 4 | 1353 |
| 5 | 15005 |
| 6 | 166408 |
| 7 | 1845493 |
| 8 | 20466831 |
| 9 | 226980634 |
| 10 | 2517253805 |
| 11 | 27916772489 |
| 12 | 309601751184 |
| 13 | 3433536035513 |
| 14 | 38078498141827 |
| 15 | 422297015595610 |
| 16 | 4683345669693537 |
| 17 | 51939099382224517 |
| 18 | 576013438874163224 |