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 | 2 |
| 1 | 11 |
| 2 | 41 |
| 3 | 137 |
| 4 | 435 |
| 5 | 1338 |
| 6 | 4024 |
| 7 | 11899 |
| 8 | 34723 |
| 9 | 100255 |
| 10 | 286947 |
| 11 | 815316 |
| 12 | 2302286 |
| 13 | 6466667 |
| 14 | 18079805 |
| 15 | 50343893 |
| 16 | 139683219 |
| 17 | 386328654 |
| 18 | 1065440068 |
| 19 | 2930780635 |
| 20 | 8043131767 |
| 21 | 22026515371 |
| 22 | 60203886531 |
| 23 | 164259660072 |
| 24 | 447431169050 |
| 25 | 1216927557323 |