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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 11 |
| 6 | 23 |
| 7 | 51 |
| 8 | 113 |
| 9 | 244 |
| 10 | 526 |
| 11 | 1142 |
| 12 | 2483 |
| 13 | 5389 |
| 14 | 11687 |
| 15 | 25358 |
| 16 | 55034 |
| 17 | 119430 |
| 18 | 259151 |
| 19 | 562340 |
| 20 | 1220276 |
| 21 | 2647993 |
| 22 | 5746085 |
| 23 | 12468857 |
| 24 | 27057165 |
| 25 | 58713537 |
| 26 | 127407187 |
| 27 | 276470942 |
| 28 | 599936262 |
| 29 | 1301849496 |
| 30 | 2824986880 |
| 31 | 6130163753 |