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 | 21 |
| 2 | 1049 |
| 3 | 29593 |
| 4 | 720305 |
| 5 | 18519049 |
| 6 | 468783431 |
| 7 | 11931365309 |
| 8 | 303182474797 |