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 | 28 |
| 2 | 784 |
| 3 | 13524 |
| 4 | 163746 |
| 5 | 1519738 |
| 6 | 11444292 |
| 7 | 72710554 |
| 8 | 400958714 |
| 9 | 1960596602 |
| 10 | 8643660124 |
| 11 | 34817290272 |
| 12 | 129528551708 |
| 13 | 449030731802 |
| 14 | 1461369918218 |
| 15 | 4493166765659 |
| 16 | 13121663640985 |
| 17 | 36566337458326 |
| 18 | 97628603745396 |