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 | 2 |
| 2 | 4 |
| 3 | 11 |
| 4 | 48 |
| 5 | 362 |
| 6 | 5030 |
| 7 | 133924 |
| 8 | 6977521 |
| 9 | 719087781 |
| 10 | 147394353130 |
| 11 | 60255915944715 |
| 12 | 49197429536084417 |
| 13 | 80280819225274033666 |
| 14 | 261914438169525117048056 |