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 | 2 |
| 2 | 16 |
| 3 | 211 |
| 4 | 6837 |
| 5 | 418876 |
| 6 | 40316253 |
| 7 | 8138711727 |
| 8 | 2968348851593 |
| 9 | 1635655868695143 |
| 10 | 1996781212118762256 |
| 11 | 4440970754945359464401 |
| 12 | 13563038968625915203795793 |