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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 24 |
| 3 | 279 |
| 4 | 4332 |
| 5 | 84075 |
| 6 | 1958058 |
| 7 | 53202387 |
| 8 | 1652070696 |
| 9 | 57713665779 |
| 10 | 2240196853710 |
| 11 | 95650311987483 |
| 12 | 4455281606078988 |
| 13 | 224815388384744859 |
| 14 | 12216916158370619010 |
| 15 | 711312392929267383075 |
| 16 | 44176151714082889756368 |
| 17 | 2915038701200389804440675 |