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) |
|---|---|
| 3 | 0 |
| 4 | 5 |
| 5 | 23 |
| 6 | 62 |
| 7 | 62 |
| 8 | 723 |
| 9 | 1578 |
| 10 | 1578 |
| 11 | 8139 |
| 12 | 39644 |
| 13 | 94323 |
| 14 | 94323 |
| 15 | 1317783 |
| 16 | 1680515 |
| 17 | 2025699 |
| 18 | 3205598 |
| 19 | 23003999 |
| 20 | 113333163 |
| 21 | 170717819 |
| 22 | 1710518799 |
| 23 | 3608109348 |
| 24 | 16655876439 |
| 25 | 24090452279 |