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 | 1 |
| 1 | 16 |
| 2 | 168 |
| 3 | 1376 |
| 4 | 9604 |
| 5 | 59488 |
| 6 | 335904 |
| 7 | 1758816 |
| 8 | 8646986 |
| 9 | 40281296 |
| 10 | 179065184 |
| 11 | 763837600 |
| 12 | 3140732344 |
| 13 | 12494160288 |
| 14 | 48236274976 |
| 15 | 181203877248 |
| 16 | 663837626163 |
| 17 | 2376282980272 |
| 18 | 8325497904672 |