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) |
|---|---|
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 6 |
| 10 | 32 |
| 11 | 140 |
| 12 | 567 |
| 13 | 2141 |
| 14 | 7731 |
| 15 | 26929 |
| 16 | 91269 |
| 17 | 302566 |
| 18 | 985178 |
| 19 | 3160480 |
| 20 | 10013151 |
| 21 | 31390529 |
| 22 | 97519183 |
| 23 | 300596765 |
| 24 | 920275456 |
| 25 | 2800635344 |