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 | 1 |
| 3 | 1 |
| 4 | 25 |
| 5 | 5 |
| 6 | 35 |
| 7 | 5 |
| 8 | 12 |
| 9 | 1925892 |
| 10 | 1925892 |
| 11 | 7355294 |
| 12 | 1022374 |
| 13 | 7739948 |
| 14 | 46933342 |
| 15 | 64577311 |
| 16 | 110312964 |
| 17 | 11444462365 |
| 18 | 7289765663 |
| 19 | 383671877 |
| 20 | 1918359385 |
| 21 | 1624255452287 |
| 22 | 41341811169355 |
| 23 | 32828553689432 |
| 24 | 10206197436475026 |
| 25 | 17430202994739058 |