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 | 8 |
| 4 | 44 |
| 5 | 208 |
| 6 | 984 |
| 7 | 4584 |
| 8 | 21314 |
| 9 | 98292 |
| 10 | 448850 |
| 11 | 2038968 |
| 12 | 9220346 |
| 13 | 41545564 |
| 14 | 186796388 |
| 15 | 838623100 |