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 | 2 |
| 6 | 19 |
| 7 | 150 |
| 8 | 1043 |
| 9 | 6843 |
| 10 | 43192 |
| 11 | 266529 |
| 12 | 1619983 |
| 13 | 9746883 |
| 14 | 58220994 |
| 15 | 345919915 |