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 | 9 |
| 2 | 137 |
| 3 | 2120 |
| 4 | 3496 |
| 5 | 88008 |
| 6 | 176451 |
| 7 | 25198140 |
| 8 | 50366472 |
| 9 | 1660042751 |
| 10 | 7902183159 |
| 11 | 260816757309 |
| 12 | 1142905318634 |
| 13 | 17475119650043 |
| 14 | 43420162171515 |