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 | 561 |
| 2 | 2821 |
| 3 | 838201 |
| 4 | 41471521 |
| 5 | 45496270561 |
| 6 | 776388344641 |
| 7 | 344361421401361 |
| 8 | 375097930710820681 |
| 9 | 330019822807208371201 |
| 10 | 4971170854788923506051 |