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 | 6 |
| 3 | 69 |
| 4 | 1432 |
| 5 | 52065 |
| 6 | 3202176 |
| 7 | 324172597 |
| 8 | 53099867136 |
| 9 | 13888279032129 |
| 10 | 5736880791449920 |
| 11 | 3710252136325373661 |
| 12 | 3729910949734728414624 |
| 13 | 5792791811385586637686849 |
| 14 | 13826260704559808415109532256 |
| 15 | 50488064853691920270244556417445 |