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 | 512 |
| 2 | 14849 |
| 3 | 163020 |
| 4 | 1062500 |
| 5 | 4975322 |
| 6 | 18514405 |
| 7 | 58154912 |
| 8 | 160338680 |
| 9 | 398601390 |
| 10 | 910893148 |
| 11 | 1941103528 |
| 12 | 3899741885 |
| 13 | 7449762880 |
| 14 | 13624665670 |
| 15 | 23987233104 |
| 16 | 40838614531 |
| 17 | 67488892468 |
| 18 | 108601809395 |
| 19 | 170627966340 |
| 20 | 262342539690 |