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 | 14 |
| 3 | 74 |
| 4 | 198 |
| 5 | 10295 |
| 6 | 65174 |
| 7 | 40354813 |
| 8 | 20485574 |
| 9 | 680909375411 |
| 10 | 0 |
| 11 | 17866904665985941 |
| 12 | 318745032938881 |