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 | 22 |
| 2 | 484 |
| 3 | 8635 |
| 4 | 151580 |
| 5 | 2703137 |
| 6 | 48302789 |
| 7 | 862007289 |
| 8 | 15379566078 |
| 9 | 274427327200 |
| 10 | 4896915028511 |
| 11 | 87380287912506 |
| 12 | 1559204462831053 |
| 13 | 27822300189794631 |
| 14 | 496458709513621497 |
| 15 | 8858765510668046944 |
| 16 | 158075026701646689756 |