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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 29 |
| 5 | 46 |
| 6 | 3049 |
| 7 | 60574 |
| 8 | 160599 |
| 9 | 182789 |
| 10 | 4913659 |
| 11 | 1072364 |
| 12 | 975570703 |
| 13 | 1039388677 |
| 14 | 5491155875 |
| 15 | 92211937094 |
| 16 | 6954047816459 |
| 17 | 7225392149719 |
| 18 | 2699717387790739 |
| 19 | 2785123121790325 |
| 20 | 573031978700759 |
| 21 | 84009502802237 |
| 22 | 45510401082365873 |
| 23 | 46518885869845328 |