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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 12 |
| 6 | 5 |
| 7 | 108 |
| 8 | 145 |
| 9 | 974 |
| 10 | 2210 |
| 11 | 17073 |
| 12 | 31950 |
| 13 | 238591 |
| 14 | 587036 |
| 15 | 3174686 |
| 16 | 9236343 |
| 17 | 50107909 |