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) |
|---|---|
| 2 | 15 |
| 3 | 102 |
| 4 | 204 |
| 5 | 408 |
| 6 | 3078 |
| 7 | 14496 |
| 8 | 88448 |
| 9 | 128768 |
| 10 | 6857312 |
| 11 | 111411968 |
| 12 | 844844000 |
| 13 | 6059394048 |
| 14 | 13384999936 |
| 15 | 948305874880 |
| 16 | 6373064359936 |
| 17 | 186505184249928 |