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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 256 |
| 3 | 13122 |
| 4 | 196608 |
| 5 | 1562500 |
| 6 | 8398080 |
| 7 | 34588806 |
| 8 | 117440512 |
| 9 | 344373768 |
| 10 | 900000000 |
| 11 | 2143588810 |
| 12 | 4729798656 |
| 13 | 9788768652 |
| 14 | 19185257728 |
| 15 | 35880468750 |
| 16 | 64424509440 |
| 17 | 111612119056 |
| 18 | 187339329792 |
| 19 | 305704134738 |
| 20 | 486400000000 |
| 21 | 756457187220 |
| 22 | 1152393344256 |
| 23 | 1722841676182 |