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 | 3 |
| 1 | 112 |
| 2 | 2016 |
| 3 | 25344 |
| 4 | 256256 |
| 5 | 2236416 |
| 6 | 17547264 |
| 7 | 127008768 |
| 8 | 862912512 |
| 9 | 5571084288 |
| 10 | 34487664640 |
| 11 | 206108098560 |
| 12 | 1195426971648 |
| 13 | 6757057298432 |
| 14 | 37346888122368 |
| 15 | 202396038856704 |
| 16 | 1077912237244416 |
| 17 | 5652245681012736 |