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 | 5 |
| 3 | 41 |
| 4 | 509 |
| 5 | 8229 |
| 6 | 166377 |
| 7 | 4016613 |
| 8 | 113044185 |
| 9 | 3630535785 |
| 10 | 131095612845 |
| 11 | 5256401729985 |
| 12 | 231748716159765 |
| 13 | 11142710564597325 |
| 14 | 580259659715478225 |
| 15 | 32535080119520689725 |