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 | 6 |
| 2 | 14 |
| 3 | 20 |
| 4 | 424 |
| 5 | 1042 |
| 6 | 8290 |
| 7 | 20802 |
| 8 | 21644 |
| 9 | 440512 |
| 10 | 548008 |
| 11 | 749171 |
| 12 | 4366390 |
| 13 | 5378548 |
| 14 | 9850174 |
| 15 | 17930596 |
| 16 | 36158854 |
| 17 | 130427194 |
| 18 | 407305710 |
| 19 | 3077094752 |
| 20 | 93416875260 |