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 | 10 |
| 2 | 82 |
| 3 | 658 |
| 4 | 5266 |
| 5 | 42130 |
| 6 | 337042 |
| 7 | 2696338 |
| 8 | 21570706 |
| 9 | 172565650 |
| 10 | 1380525202 |
| 11 | 11044201618 |
| 12 | 88353612946 |
| 13 | 706828903570 |
| 14 | 5654631228562 |
| 15 | 45237049828498 |
| 16 | 361896398627986 |
| 17 | 2895171189023890 |
| 18 | 23161369512191122 |
| 19 | 185290956097528978 |
| 20 | 1482327648780231826 |