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 | 5 |
| 2 | 17 |
| 3 | 80 |
| 4 | 257 |
| 5 | 1280 |
| 6 | 4352 |
| 7 | 8060 |
| 8 | 65537 |
| 9 | 327680 |
| 10 | 1065220 |
| 11 | 1089452 |
| 12 | 1114112 |
| 13 | 16842752 |
| 14 | 100340800 |
| 15 | 383479200 |
| 16 | 466344000000 |