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 | 1 |
| 5 | 110 |
| 6 | 1 |
| 7 | 5026 |
| 8 | 10070 |
| 9 | 362862 |
| 10 | 1 |
| 11 | 39916778 |
| 12 | 34 |
| 13 | 6227020774 |
| 14 | 25152407 |
| 15 | 1307674367970 |
| 16 | 50917 |
| 17 | 355687428095966 |
| 18 | 256443711659 |
| 19 | 121645100408831962 |
| 20 | 1286 |
| 21 | 51090942171709439958 |
| 22 | 111014413076599 |
| 23 | 25852016738884976639954 |
| 24 | 51704033477769953279974 |