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) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 22 |
| 4 | 292 |
| 5 | 6120 |
| 6 | 193594 |
| 7 | 9070536 |
| 8 | 622336756 |
| 9 | 61915861962 |
| 10 | 8846814822932 |
| 11 | 1798543906246948 |
| 12 | 515674104905890202 |
| 13 | 206833212761446463192 |
| 14 | 115198617558900993580396 |
| 15 | 88503974769306037986089170 |
| 16 | 93233054587165663487254293572 |