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 | 314 |
| 3 | 6556 |
| 4 | 139344 |
| 5 | 2976416 |
| 6 | 63663808 |
| 7 | 1362242592 |
| 8 | 29151501760 |
| 9 | 623849225024 |
| 10 | 13350628082560 |
| 11 | 285709494797952 |
| 12 | 6114316283697408 |
| 13 | 130849237522680064 |
| 14 | 2800235203724240384 |
| 15 | 59926350645878761984 |
| 16 | 1282452098548524184576 |
| 17 | 27445078313878468469760 |