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 | 420 |
| 3 | 27910 |
| 4 | 2624603 |
| 5 | 318800200 |
| 6 | 47439020042 |
| 7 | 8353801755006 |
| 8 | 1698808167100876 |
| 9 | 391746480089540115 |
| 10 | 101004512021025221012 |
| 11 | 28791615763253886202480 |
| 12 | 8990685731188213404550239 |
| 13 | 3052132045866636492112058599 |