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) |
|---|---|
| 2 | 1 |
| 3 | 73 |
| 4 | 4745 |
| 5 | 304265 |
| 6 | 19477641 |
| 7 | 1246606473 |
| 8 | 79783113865 |
| 9 | 5106121684105 |
| 10 | 326791806956681 |
| 11 | 20914675798619273 |
| 12 | 1338539252338766985 |
| 13 | 85666512159498155145 |
| 14 | 5482656778286418474121 |
| 15 | 350890033810959074702473 |