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 | 17 |
| 2 | 103 |
| 3 | 1764391 |
| 4 | 8907752079422393063 |
| 5 | 28959877095025359725108610631647478770525190687597954707985655095645523042346644747326776183477265033 |