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 | 6 |
| 1 | 36 |
| 2 | 221 |
| 3 | 1361 |
| 4 | 8386 |
| 5 | 51676 |
| 6 | 318441 |
| 7 | 1962321 |
| 8 | 12092366 |
| 9 | 74516516 |
| 10 | 459191461 |
| 11 | 2829665281 |
| 12 | 17437183146 |
| 13 | 107452764156 |
| 14 | 662153768081 |
| 15 | 4080375372641 |
| 16 | 25144406003926 |
| 17 | 154946811396196 |
| 18 | 954825274381101 |
| 19 | 5883898457682801 |