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 | 19 |
| 3 | 235 |
| 4 | 4331 |
| 5 | 104331 |
| 6 | 3090315 |
| 7 | 108503819 |
| 8 | 4403471115 |
| 9 | 202762761483 |
| 10 | 10442762761483 |
| 11 | 594761064172811 |
| 12 | 37115108500229387 |
| 13 | 2518267981703965963 |
| 14 | 184577387811646500107 |
| 15 | 14533484387811646500107 |
| 16 | 1223459304002440821206283 |
| 17 | 109651494909968373175414027 |