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 | 1 |
| 2 | 24 |
| 3 | 391 |
| 4 | 6240 |
| 5 | 99457 |
| 6 | 1585080 |
| 7 | 25261831 |
| 8 | 402604224 |
| 9 | 6416405761 |
| 10 | 102259887960 |
| 11 | 1629741801607 |
| 12 | 25973608937760 |
| 13 | 413948001202561 |
| 14 | 6597194410303224 |
| 15 | 105141162563649031 |
| 16 | 1675661406608081280 |