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 | 8 |
| 2 | 144 |
| 3 | 1944 |
| 4 | 23328 |
| 5 | 262440 |
| 6 | 2834352 |
| 7 | 29760696 |
| 8 | 306110016 |
| 9 | 3099363912 |
| 10 | 30993639120 |
| 11 | 306837027288 |
| 12 | 3012581722464 |
| 13 | 29372671794024 |
| 14 | 284688972772848 |
| 15 | 2745215094595320 |
| 16 | 26354064908115072 |
| 17 | 252010745683850376 |
| 18 | 2401514164751985936 |
| 19 | 22814384565143866392 |
| 20 | 216136274827678734240 |