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 | 7 |
| 3 | 263 |
| 4 | 90614 |
| 5 | 165041329 |
| 6 | 861723619902 |
| 7 | 10351918806321621 |
| 8 | 253216618556625008961 |
| 9 | 11542463442106815907796586 |
| 10 | 915449471830886733265105097578 |