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 | 3 |
| 2 | 22 |
| 3 | 235 |
| 4 | 3139 |
| 5 | 49376 |
| 6 | 891491 |
| 7 | 18160071 |
| 8 | 411124024 |
| 9 | 10212362573 |
| 10 | 275543711899 |
| 11 | 8012352809874 |
| 12 | 249516568317597 |
| 13 | 8277748828228015 |
| 14 | 291219448755079278 |
| 15 | 10821916875914147551 |
| 16 | 423314732431005599479 |