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 | 6 |
| 3 | 63 |
| 4 | 986 |
| 5 | 20685 |
| 6 | 545736 |
| 7 | 17365336 |
| 8 | 647216568 |
| 9 | 27653205177 |
| 10 | 1332422277828 |
| 11 | 71470510481961 |
| 12 | 4223498675806638 |
| 13 | 272615162534575302 |
| 14 | 19082609490868539738 |
| 15 | 1439738711122827542742 |
| 16 | 116468234559061615308870 |