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 | 1 |
| 1 | 2 |
| 2 | 845 |
| 3 | 20172 |
| 4 | 2289869 |
| 5 | 97964230 |
| 6 | 7649951296 |
| 7 | 405583759128 |
| 8 | 27499952912185 |
| 9 | 1591141858520618 |
| 10 | 101905561228130549 |
| 11 | 6113307278736517860 |
| 12 | 382470784319563068389 |
| 13 | 23290532695631115845632 |
| 14 | 1443134633691436850272225 |
| 15 | 88425947348303637210263088 |