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 | 2 |
| 2 | 16 |
| 3 | 208 |
| 4 | 3968 |
| 5 | 109568 |
| 6 | 4793344 |
| 7 | 410662912 |
| 8 | 82657083392 |
| 9 | 38274970222592 |
| 10 | 37590755515826176 |
| 11 | 75458309991776124928 |
| 12 | 305873605165090925969408 |
| 13 | 2491832958314452159507202048 |
| 14 | 40704585435508852018947014262784 |