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) |
|---|---|
| 8 | 1 |
| 9 | 24 |
| 10 | 342 |
| 11 | 3804 |
| 12 | 36802 |
| 13 | 326540 |
| 14 | 2735308 |
| 15 | 22006264 |
| 16 | 171912401 |
| 17 | 1313614776 |
| 18 | 9868281330 |
| 19 | 73150450248 |
| 20 | 536495354621 |
| 21 | 3900954906412 |
| 22 | 28164962681150 |
| 23 | 202166363020920 |
| 24 | 1444068530799525 |
| 25 | 10272599729628876 |