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 | 3 |
| 2 | 54 |
| 3 | 1140 |
| 4 | 24360 |
| 5 | 521064 |
| 6 | 11146656 |
| 7 | 238452456 |
| 8 | 5101047216 |
| 9 | 109123156248 |
| 10 | 2334395822496 |
| 11 | 49938107061384 |
| 12 | 1068291209653392 |
| 13 | 22853211220567416 |
| 14 | 488882861126970624 |