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 | 8 |
| 2 | 64 |
| 3 | 295 |
| 4 | 1256 |
| 5 | 5304 |
| 6 | 21952 |
| 7 | 89744 |
| 8 | 364088 |
| 9 | 1469600 |
| 10 | 5913146 |
| 11 | 23742816 |
| 12 | 95207208 |
| 13 | 381443400 |
| 14 | 1527379724 |
| 15 | 6113711024 |
| 16 | 24465803130 |
| 17 | 97891852484 |
| 18 | 391642313112 |
| 19 | 1566765146976 |
| 20 | 6267573103552 |
| 21 | 25071633380208 |
| 22 | 100290042754410 |