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 | 3 |
| 4 | 15 |
| 5 | 98 |
| 6 | 596 |
| 7 | 3626 |
| 8 | 22704 |
| 9 | 146834 |
| 10 | 983476 |
| 11 | 6846451 |
| 12 | 49364315 |
| 13 | 367660050 |