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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 3 |
| 10 | 10 |
| 11 | 31 |
| 12 | 229 |
| 13 | 2036 |
| 14 | 21399 |
| 15 | 245342 |
| 16 | 3004881 |
| 17 | 38904499 |
| 18 | 530452205 |
| 19 | 7640941062 |