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 | 1 |
| 2 | 2064 |
| 3 | 265842 |
| 4 | 8389120 |
| 5 | 122071875 |
| 6 | 1088395056 |
| 7 | 6920652004 |
| 8 | 34359754752 |
| 9 | 141214797765 |
| 10 | 500000050000 |
| 11 | 1569214268886 |
| 12 | 4458050348544 |
| 13 | 11649042746887 |
| 14 | 28346956456560 |
| 15 | 64873169325000 |
| 16 | 140737488879616 |
| 17 | 291311119324809 |