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 | 1 |
| 2 | 5 |
| 3 | 93 |
| 4 | 6477 |
| 5 | 1733677 |
| 6 | 1816333805 |
| 7 | 7526310334829 |
| 8 | 124031223014725741 |
| 9 | 8152285307423733458541 |
| 10 | 2140200604371078953284092525 |
| 11 | 2245805993494514875022552272042605 |
| 12 | 9423041917569791458584837551185555483245 |
| 13 | 158121354267437848361217045222877873550507035245 |