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 | 15 |
| 2 | 1548 |
| 3 | 168386 |
| 4 | 18328142 |
| 5 | 1994963186 |
| 6 | 217145777610 |
| 7 | 23635668646510 |
| 8 | 2572671863723654 |
| 9 | 280027640317060130 |
| 10 | 30480171391948784938 |
| 11 | 3317675523140039250350 |
| 12 | 361119061152982241895174 |
| 13 | 39306730094143339494849314 |
| 14 | 4278420047285488959291378858 |
| 15 | 465693230069569504343096792622 |