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 | 56 |
| 3 | 296 |
| 4 | 1816 |
| 5 | 10728 |
| 6 | 62648 |
| 7 | 365464 |
| 8 | 2130488 |
| 9 | 12424112 |
| 10 | 72464136 |
| 11 | 422680024 |
| 12 | 2465699704 |
| 13 | 14384367304 |
| 14 | 83919450272 |
| 15 | 489611186736 |
| 16 | 2856635570680 |
| 17 | 16667509269248 |
| 18 | 97251708586688 |