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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 8 |
| 10 | 43 |
| 11 | 196 |
| 12 | 814 |
| 13 | 3188 |
| 14 | 12018 |
| 15 | 44178 |
| 16 | 159660 |
| 17 | 570262 |
| 18 | 2019964 |
| 19 | 7112774 |
| 20 | 24940259 |
| 21 | 87191430 |
| 22 | 304203350 |
| 23 | 1059928798 |
| 24 | 3690123329 |
| 25 | 12841859908 |
| 26 | 44685411866 |
| 27 | 155506929954 |
| 28 | 541315997526 |
| 29 | 1885045535888 |
| 30 | 6567524381098 |
| 31 | 22893857129004 |
| 32 | 79853551127325 |