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 | 14 |
| 2 | 252 |
| 3 | 5957 |
| 4 | 179270 |
| 5 | 6641502 |
| 6 | 294524076 |
| 7 | 15285260326 |
| 8 | 911664081027 |
| 9 | 61573228385424 |
| 10 | 4652227417900405 |
| 11 | 389256081747220268 |
| 12 | 35759870451009454561 |
| 13 | 3580704593280285017869 |
| 14 | 388344720309998846243731 |