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 | 18 |
| 2 | 162 |
| 3 | 978 |
| 4 | 4482 |
| 5 | 16722 |
| 6 | 53154 |
| 7 | 148626 |
| 8 | 374274 |
| 9 | 864146 |
| 10 | 1854882 |
| 11 | 3742290 |
| 12 | 7159170 |
| 13 | 13079250 |
| 14 | 22952610 |
| 15 | 38878482 |
| 16 | 63821826 |
| 17 | 101880594 |
| 18 | 158611106 |
| 19 | 241419474 |
| 20 | 360027522 |
| 21 | 527022162 |
| 22 | 758497698 |
| 23 | 1074801042 |
| 24 | 1501390338 |