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 | 6 |
| 2 | 64 |
| 3 | 768 |
| 4 | 9708 |
| 5 | 126386 |
| 6 | 1676956 |
| 7 | 22548168 |
| 8 | 306167324 |
| 9 | 4188703512 |
| 10 | 57649462164 |
| 11 | 797294161824 |
| 12 | 11071026740964 |
| 13 | 154250752864812 |
| 14 | 2155368246401224 |
| 15 | 30192512693210888 |
| 16 | 423859798484668188 |
| 17 | 5961793387214958792 |
| 18 | 83998039356129372448 |
| 19 | 1185277027372535468544 |