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 | 2 |
| 2 | 13 |
| 3 | 571 |
| 4 | 172585 |
| 5 | 357625693 |
| 6 | 5248165593907 |
| 7 | 566958191345077996 |
| 8 | 465798195439736703244606 |
| 9 | 2982999334066325867630228374270 |
| 10 | 151658307264909973462110073089257457502 |