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) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 260 |
| 4 | 1960 |
| 5 | 29524 |
| 6 | 80444 |
| 7 | 402288 |
| 8 | 784092 |
| 9 | 2467256 |
| 10 | 9913708 |
| 11 | 14791712 |
| 12 | 42762084 |
| 13 | 79168376 |
| 14 | 105356020 |
| 15 | 179653552 |
| 16 | 369405972 |
| 17 | 703008836 |
| 18 | 858672844 |
| 19 | 1507639628 |
| 20 | 2135004648 |
| 21 | 2522237016 |
| 22 | 4051457488 |
| 23 | 5449006108 |
| 24 | 8283021384 |