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 | 18 |
| 2 | 20 |
| 3 | 88 |
| 4 | 368 |
| 5 | 1504 |
| 6 | 24448 |
| 7 | 98048 |
| 8 | 5238976 |
| 9 | 25161728 |
| 10 | 2730992944 |
| 11 | 33995232256 |
| 12 | 412316336128 |
| 13 | 1391737114624 |
| 14 | 7732492570624 |