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 | 8989 |
| 2 | 213445 |
| 3 | 1651609 |
| 4 | 7544041 |
| 5 | 25289461 |
| 6 | 69125869 |
| 7 | 163456945 |
| 8 | 346843729 |
| 9 | 676661581 |
| 10 | 1234422421 |
| 11 | 2131762249 |
| 12 | 3517093945 |
| 13 | 5582925349 |
| 14 | 8573842621 |
| 15 | 12795158881 |
| 16 | 18622228129 |
| 17 | 26510424445 |
| 18 | 37005786469 |
| 19 | 50756327161 |