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 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 39 |
| 5 | 2466 |
| 6 | 39457 |
| 7 | 157827 |
| 8 | 646456993 |
| 9 | 694127911065419642 |
| 10 | 186328542329173367306815834 |
| 11 | 48844909400338823199277929902126 |
| 12 | 51217599719369681875006054625051616350 |