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 | 12 |
| 2 | 337 |
| 3 | 5529 |
| 4 | 80692 |
| 5 | 1229783 |
| 6 | 18519049 |
| 7 | 280040904 |
| 8 | 4229571209 |
| 9 | 63907047147 |
| 10 | 965490629060 |
| 11 | 14586966316231 |
| 12 | 220382236868025 |