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 | 2 |
| 2 | 5 |
| 3 | 31 |
| 4 | 449 |
| 5 | 6271 |
| 6 | 87361 |
| 7 | 1216799 |
| 8 | 16947841 |
| 9 | 236052991 |
| 10 | 3287794049 |
| 11 | 45793063711 |
| 12 | 637815097921 |
| 13 | 8883618307199 |
| 14 | 123732841202881 |
| 15 | 1723376158533151 |
| 16 | 24003533378261249 |
| 17 | 334326091137124351 |