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 | 5 |
| 3 | 51 |
| 4 | 869 |
| 5 | 22202 |
| 6 | 803053 |
| 7 | 39901447 |
| 8 | 2677520438 |
| 9 | 239963727089 |
| 10 | 28509710041427 |
| 11 | 4469877880908109 |
| 12 | 921904263806801157 |
| 13 | 249426774472230102453 |
| 14 | 88324099839785869552329 |