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 | 11 |
| 2 | 421 |
| 3 | 27911 |
| 4 | 2624603 |
| 5 | 318800201 |
| 6 | 47439020042 |
| 7 | 8353801755007 |
| 8 | 1698808167100876 |
| 9 | 391746480089540116 |
| 10 | 101004512021025221013 |
| 11 | 28791615763253886202481 |
| 12 | 8990685731188213404550239 |
| 13 | 3052132045866636492112058600 |
| 14 | 1119164206256115117485135326642 |
| 15 | 440822282742124422495281791483359 |