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 | 1 |
| 2 | 0 |
| 3 | 5 |
| 4 | 26 |
| 5 | 14 |
| 6 | 100 |
| 7 | 323 |
| 8 | 1671 |
| 9 | 4293 |
| 10 | 10934 |
| 11 | 208741 |
| 12 | 753123 |
| 13 | 627460 |
| 14 | 87918559 |
| 15 | 1137656208 |