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 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 11 |
| 7 | 36 |
| 8 | 92 |
| 9 | 491 |
| 10 | 2557 |
| 11 | 11353 |
| 12 | 60105 |
| 13 | 362506 |
| 14 | 2169246 |
| 15 | 13580815 |
| 16 | 91927435 |
| 17 | 650078097 |
| 18 | 4762023647 |
| 19 | 36508923530 |
| 20 | 292117087090 |
| 21 | 2424048335917 |
| 22 | 20847410586719 |
| 23 | 185754044235873 |
| 24 | 1711253808769653 |
| 25 | 16272637428430152 |