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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 6 |
| 3 | 17 |
| 4 | 42 |
| 5 | 119 |
| 6 | 305 |
| 7 | 829 |
| 8 | 2196 |
| 9 | 5907 |
| 10 | 15863 |
| 11 | 42842 |
| 12 | 115845 |
| 13 | 314368 |
| 14 | 854647 |
| 15 | 2329087 |
| 16 | 6358855 |
| 17 | 17393327 |
| 18 | 47652117 |
| 19 | 130752969 |
| 20 | 359270784 |
| 21 | 988458115 |
| 22 | 2722792878 |