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 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 9 |
| 5 | 14 |
| 6 | 31 |
| 7 | 53 |
| 8 | 117 |
| 9 | 215 |
| 10 | 478 |
| 11 | 930 |
| 12 | 2092 |
| 13 | 4266 |
| 14 | 9732 |
| 15 | 20645 |
| 16 | 47820 |
| 17 | 104941 |
| 18 | 246931 |
| 19 | 558190 |
| 20 | 1334462 |
| 21 | 3097018 |
| 22 | 7521731 |
| 23 | 17874931 |
| 24 | 44092014 |