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 | 181 |
| 2 | 6621 |
| 3 | 101241 |
| 4 | 903881 |
| 5 | 5590989 |
| 6 | 26515269 |
| 7 | 102908209 |
| 8 | 341661649 |
| 9 | 1001294629 |
| 10 | 2650436845 |
| 11 | 6447019305 |
| 12 | 14603375385 |
| 13 | 31126140605 |
| 14 | 62948716245 |
| 15 | 121608649569 |
| 16 | 225663101089 |
| 17 | 404083136149 |
| 18 | 700922413309 |
| 19 | 1181618464729 |
| 20 | 1941355693161 |
| 21 | 3115998965421 |
| 22 | 4896195782501 |