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 | 216 |
| 2 | 1116 |
| 3 | 5766 |
| 4 | 29790 |
| 5 | 153906 |
| 6 | 795144 |
| 7 | 4108062 |
| 8 | 21223992 |
| 9 | 109652160 |
| 10 | 566509902 |
| 11 | 2926831878 |
| 12 | 15121261374 |
| 13 | 78122885724 |
| 14 | 403616150730 |
| 15 | 2085253182384 |
| 16 | 10773307330236 |
| 17 | 55659500700198 |
| 18 | 287560720444278 |
| 19 | 1485661331645130 |