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 | 26 |
| 2 | 676 |
| 3 | 2080 |
| 4 | 6400 |
| 5 | 29760 |
| 6 | 138384 |
| 7 | 592968 |
| 8 | 2540836 |
| 9 | 11151624 |
| 10 | 48944016 |
| 11 | 213853728 |
| 12 | 934402624 |
| 13 | 4090548624 |
| 14 | 17907257124 |
| 15 | 78350974272 |
| 16 | 342814934016 |
| 17 | 1500522625152 |
| 18 | 6567882332944 |
| 19 | 28741775057096 |
| 20 | 125777167061764 |