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 | 2 |
| 2 | 13 |
| 3 | 971 |
| 4 | 121367 |
| 5 | 317783 |
| 6 | 3416454622906631 |
| 7 | 3807901929474025356630904133903 |
| 8 | 757791618667731139247631372099907 |