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 | 1 |
| 2 | 3 |
| 3 | 91 |
| 4 | 31827 |
| 5 | 2147158387 |
| 6 | 9223372011085950171 |
| 7 | 170141183460469231602560095290109272523 |
| 8 | 57896044618658097711785492504343953923912733397452774312538303978325772978595 |