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) |
|---|---|
| 0 | -5 |
| 1 | -6 |
| 2 | -4 |
| 3 | 21 |
| 4 | 26 |
| 5 | 521 |
| 6 | 31 |
| 7 | 13021 |
| 8 | 626 |
| 9 | 15501 |
| 10 | 781 |
| 11 | 8138021 |
| 12 | 601 |
| 13 | 203450521 |
| 14 | 19531 |
| 15 | 464881 |
| 16 | 390626 |
| 17 | 127156575521 |
| 18 | 15751 |
| 19 | 3178914388021 |
| 20 | 375601 |
| 21 | 290639881 |
| 22 | 12207031 |
| 23 | 1986821492513021 |
| 24 | 390001 |
| 25 | 95336923825001 |