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 | 6 |
| 2 | 27 |
| 3 | 120 |
| 4 | 519 |
| 5 | 1932 |
| 6 | 6484 |
| 7 | 20310 |
| 8 | 55034 |
| 9 | 113892 |
| 10 | 178495 |
| 11 | 179196 |
| 12 | 89728 |
| 13 | 16176 |
| 14 | 1488 |
| 15 | 144 |