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 | 15 |
| 1 | 16 |
| 2 | 79 |
| 3 | 253 |
| 4 | 838 |
| 5 | 3605 |
| 6 | 4443 |
| 7 | 136895 |
| 8 | 141338 |
| 9 | 702247 |
| 10 | 2248079 |
| 11 | 7446484 |
| 12 | 32034015 |
| 13 | 39480499 |
| 14 | 1216448985 |
| 15 | 1255929484 |
| 16 | 6240166921 |
| 17 | 19976430247 |
| 18 | 66169457662 |
| 19 | 284654260895 |
| 20 | 350823718557 |
| 21 | 10809365817605 |
| 22 | 11160189536162 |
| 23 | 55450123962253 |
| 24 | 177510561422921 |