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 | 1 |
| 5 | 1 |
| 6 | 11 |
| 7 | 13 |
| 8 | 82 |
| 9 | 162 |
| 10 | 929 |
| 11 | 1369 |
| 12 | 13718 |
| 13 | 16421 |
| 14 | 124689 |
| 15 | 355792 |
| 16 | 1356698 |
| 17 | 2555043 |
| 18 | 25933641 |
| 19 | 32931815 |
| 20 | 283329802 |
| 21 | 720489742 |
| 22 | 3308253663 |
| 23 | 5763641923 |
| 24 | 60874684720 |
| 25 | 93543112675 |
| 26 | 600086794431 |