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 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 11 |
| 7 | 28 |
| 8 | 68 |
| 9 | 174 |
| 10 | 445 |
| 11 | 1166 |
| 12 | 3068 |
| 13 | 8190 |
| 14 | 21994 |
| 15 | 59585 |
| 16 | 162360 |
| 17 | 445145 |
| 18 | 1226376 |
| 19 | 3394654 |
| 20 | 9434260 |
| 21 | 26317865 |
| 22 | 73661588 |
| 23 | 206809307 |
| 24 | 582255448 |
| 25 | 1643536725 |
| 26 | 4650250254 |
| 27 | 13186484316 |
| 28 | 37468566744 |
| 29 | 106666821221 |
| 30 | 304200399505 |
| 31 | 868977304140 |
| 32 | 2486163857424 |