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 | 11 |
| 2 | 596 |
| 3 | 9627 |
| 4 | 103129 |
| 5 | 780902 |
| 6 | 4557284 |
| 7 | 21670160 |
| 8 | 87396728 |
| 9 | 308055528 |
| 10 | 971055240 |
| 11 | 2780440664 |
| 12 | 7324967640 |
| 13 | 17945144328 |
| 14 | 41249101928 |
| 15 | 89635336440 |
| 16 | 185317652664 |
| 17 | 366517590440 |
| 18 | 696695849928 |