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) |
|---|---|
| 0 | 2 |
| 1 | 14 |
| 2 | 154 |
| 3 | 2926 |
| 4 | 67298 |
| 5 | 2490026 |
| 6 | 102091066 |
| 7 | 5410826498 |
| 8 | 319238763382 |
| 9 | 22665952200122 |
| 10 | 1654614510608906 |
| 11 | 147260691444192634 |
| 12 | 14284287070086685498 |
| 13 | 1528418716499275348286 |
| 14 | 166597640098421012963174 |
| 15 | 21824290852893152698175794 |