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) |
|---|---|
| 3 | 0 |
| 4 | 6 |
| 5 | 10678 |
| 6 | 169232 |
| 7 | 895970 |
| 8 | 3151504 |
| 9 | 8793698 |
| 10 | 21026206 |
| 11 | 44936970 |
| 12 | 88129194 |
| 13 | 161444970 |
| 14 | 279781318 |
| 15 | 462998626 |
| 16 | 736921490 |
| 17 | 1134431954 |
| 18 | 1696655150 |
| 19 | 2474237338 |