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 | 5 |
| 3 | 14 |
| 4 | 124 |
| 5 | 399 |
| 6 | 4552 |
| 7 | 15898 |
| 8 | 203095 |
| 9 | 37029521 |
| 10 | 105973558438 |
| 11 | 19140185454656173 |
| 12 | 3827634977577891833517 |