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 | 1 |
| 5 | 1 |
| 6 | 4 |
| 7 | 7 |
| 8 | 11 |
| 9 | 22 |
| 10 | 81 |
| 11 | 235 |
| 12 | 673 |
| 13 | 2063 |
| 14 | 5716 |
| 15 | 13627 |
| 16 | 33752 |
| 17 | 95729 |
| 18 | 298232 |
| 19 | 946563 |
| 20 | 2977953 |
| 21 | 9147328 |
| 22 | 27004159 |
| 23 | 76880498 |
| 24 | 217826819 |
| 25 | 637089405 |
| 26 | 1949908577 |
| 27 | 6160707450 |
| 28 | 19627448025 |
| 29 | 61909478550 |
| 30 | 191681762379 |
| 31 | 583025396879 |
| 32 | 1756696160636 |