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 | 1 |
| 3 | 3 |
| 4 | 12 |
| 5 | 79 |
| 6 | 1123 |
| 7 | 42065 |
| 8 | 4880753 |
| 9 | 1674021742 |
| 10 | 1612191702946 |
| 11 | 4291399235883144 |
| 12 | 31570649902282023158 |
| 13 | 644451747846907273827686 |
| 14 | 36675914469877423648734408329 |
| 15 | 5846124500387959287169919356171145 |