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 | 5 |
| 3 | 49 |
| 4 | 1117 |
| 5 | 57181 |
| 6 | 7086833 |
| 7 | 2109733585 |
| 8 | 1508630963069 |
| 9 | 2591308566579217 |
| 10 | 10691434112980070315 |
| 11 | 105957942450483004330197 |
| 12 | 2522387398320711543274084153 |
| 13 | 144235039901139444727535460625985 |
| 14 | 19811186631607253937472121882634566325 |