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 | 8 |
| 2 | 42 |
| 3 | 303 |
| 4 | 2574 |
| 5 | 22128 |
| 6 | 175180 |
| 7 | 1231170 |
| 8 | 7652503 |
| 9 | 42460424 |
| 10 | 212971589 |
| 11 | 977395362 |
| 12 | 4147719749 |
| 13 | 16420984346 |
| 14 | 61103700814 |
| 15 | 215040758842 |
| 16 | 719522481940 |
| 17 | 2299243641848 |
| 18 | 7043942786447 |
| 19 | 20758083457211 |
| 20 | 59015575393057 |