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 | 16 |
| 3 | 276 |
| 4 | 4960 |
| 5 | 91390 |
| 6 | 1712304 |
| 7 | 32468436 |
| 8 | 621216192 |
| 9 | 11969016345 |
| 10 | 231900297200 |
| 11 | 4513667845896 |
| 12 | 88188515933856 |
| 13 | 1728597141547640 |
| 14 | 33976189889821200 |
| 15 | 669413654240461560 |
| 16 | 13216710966550396800 |