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 | 3 |
| 2 | 24 |
| 3 | 361 |
| 4 | 7851 |
| 5 | 214245 |
| 6 | 6815986 |
| 7 | 242659191 |
| 8 | 9431036685 |
| 9 | 393771017068 |
| 10 | 17469277612998 |
| 11 | 817033067908275 |
| 12 | 40050828368606412 |
| 13 | 2048642917085523633 |
| 14 | 108968676087557745858 |
| 15 | 6010617981960195923285 |
| 16 | 343038687551360605111371 |