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 | 1 |
| 1 | 3 |
| 2 | 45 |
| 3 | 75 |
| 4 | 135 |
| 5 | 259 |
| 6 | 863 |
| 7 | 1786 |
| 8 | 2483 |
| 9 | 2538 |
| 10 | 5731 |
| 11 | 16095 |
| 12 | 36692 |
| 13 | 94720 |