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 | 28 |
| 3 | 182 |
| 4 | 4760 |
| 5 | 31654 |
| 6 | 428260 |
| 7 | 2941470 |
| 8 | 163761840 |
| 9 | 1152562950 |
| 10 | 16381761396 |
| 11 | 117402623338 |
| 12 | 3390322778024 |
| 13 | 24634522766126 |
| 14 | 360043025043380 |
| 15 | 2644479279859438 |
| 16 | 312191499849352032 |
| 17 | 2312918756095439814 |
| 18 | 34398444513178377492 |