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 | 34 |
| 3 | 1165 |
| 4 | 42205 |
| 5 | 1940868 |
| 6 | 79826592 |
| 7 | 3467525301 |
| 8 | 150293731826 |
| 9 | 6540976400913 |
| 10 | 285499775348185 |
| 11 | 12468705796935816 |
| 12 | 545183904690537217 |
| 13 | 23847514960230618480 |
| 14 | 1043490861604911009586 |
| 15 | 45668994694128002511925 |