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 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 35 |
| 6 | 159 |
| 7 | 979 |
| 8 | 7870 |
| 9 | 80898 |
| 10 | 1050628 |
| 11 | 17117967 |
| 12 | 348650347 |
| 13 | 8866137878 |
| 14 | 281540044623 |
| 15 | 11172327581631 |
| 16 | 554607985588213 |
| 17 | 34475080278856486 |
| 18 | 2685981999907232301 |
| 19 | 262507094271746005965 |
| 20 | 32206094635505510590194 |