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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 3433 |
| 15 | 12871 |
| 16 | 35751 |
| 17 | 87517 |
| 18 | 199785 |
| 19 | 436697 |
| 20 | 927657 |
| 21 | 401005793 |
| 22 | 3296326113 |
| 23 | 17887397621 |
| 24 | 80157730101 |
| 25 | 321127444171 |
| 26 | 1195366208091 |
| 27 | 4226755326331 |
| 28 | 486914893507831 |
| 29 | 6899197122043711 |
| 30 | 61532746814157691 |
| 31 | 436349292456987871 |