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 | 1 |
| 1 | 12 |
| 2 | 258 |
| 3 | 8274 |
| 4 | 353742 |
| 5 | 18904602 |
| 6 | 1212354798 |
| 7 | 90706565514 |
| 8 | 7756033173342 |
| 9 | 746093257148442 |
| 10 | 79745110236049038 |
| 11 | 9375786203927344554 |
| 12 | 1202540991574287431742 |
| 13 | 167091435183140588426682 |
| 14 | 25003060551369349424359278 |
| 15 | 4008624526767825553573112394 |