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 | 1 |
| 6 | 26 |
| 7 | 460 |
| 8 | 7071 |
| 9 | 102788 |
| 10 | 1469419 |
| 11 | 21101676 |
| 12 | 308396208 |
| 13 | 4627521637 |
| 14 | 71750494216 |
| 15 | 1155187096545 |