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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 128 |
| 4 | 521 |
| 5 | 649 |
| 6 | 1819 |
| 7 | 2468 |
| 8 | 11691 |
| 9 | 166142 |
| 10 | 676259 |
| 11 | 842401 |
| 12 | 2361061 |
| 13 | 3203462 |
| 14 | 15174909 |
| 15 | 215652188 |
| 16 | 877783661 |
| 17 | 1093435849 |
| 18 | 3064655359 |
| 19 | 4158091208 |
| 20 | 19697020191 |
| 21 | 279916373882 |
| 22 | 1139362515719 |
| 23 | 1419278889601 |
| 24 | 3977920294921 |
| 25 | 5397199184522 |
| 26 | 25566717033009 |
| 27 | 363331237646648 |
| 28 | 1478891667619601 |
| 29 | 1842222905266249 |
| 30 | 5163337478152099 |
| 31 | 7005560383418348 |
| 32 | 33185579011825491 |