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 | 181 |
| 4 | 59 |
| 5 | 3455 |
| 6 | 3332389 |
| 7 | 173339393 |
| 8 | 449509681 |
| 9 | 198232237033 |
| 10 | 1032475444411 |
| 11 | 101635950910031 |
| 12 | 71432133543444211 |
| 13 | 671713726985602398481 |