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 | 64 |
| 3 | 1510 |
| 4 | 17600 |
| 5 | 130835 |
| 6 | 713216 |
| 7 | 3098604 |
| 8 | 11320320 |
| 9 | 36074325 |
| 10 | 102925120 |
| 11 | 268038706 |
| 12 | 646519744 |
| 13 | 1460878055 |
| 14 | 3120396800 |
| 15 | 6346379480 |
| 16 | 12363588096 |
| 17 | 23184837609 |
| 18 | 42023883840 |
| 19 | 73881649150 |
| 20 | 126362703040 |
| 21 | 210792998011 |
| 22 | 343726413824 |
| 23 | 548946959300 |
| 24 | 860095808000 |