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 | 0 |
| 2 | 12 |
| 3 | 216 |
| 4 | 1104 |
| 5 | 3708 |
| 6 | 9396 |
| 7 | 20304 |
| 8 | 38868 |
| 9 | 68364 |
| 10 | 112632 |
| 11 | 176076 |
| 12 | 263832 |
| 13 | 381924 |
| 14 | 536424 |
| 15 | 735240 |
| 16 | 985896 |
| 17 | 1296540 |
| 18 | 1676508 |
| 19 | 2137392 |
| 20 | 2689248 |
| 21 | 3344244 |
| 22 | 4114020 |