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 | 243 |
| 2 | 1049 |
| 3 | 63183 |
| 4 | 607115 |
| 5 | 20168447 |
| 6 | 285332189 |
| 7 | 7257445621 |
| 8 | 124234358895 |
| 9 | 2783396055591 |
| 10 | 52032195606049 |
| 11 | 1099686106378363 |
| 12 | 21401861684236265 |
| 13 | 440426781367948209 |
| 14 | 8729796620293368601 |
| 15 | 177478732361408469929 |