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 | 2 |
| 2 | 6 |
| 3 | 10 |
| 4 | 24 |
| 5 | 54 |
| 6 | 96 |
| 7 | 200 |
| 8 | 442 |
| 9 | 650 |
| 10 | 1548 |
| 11 | 2370 |
| 12 | 4060 |
| 13 | 7670 |
| 14 | 15792 |
| 15 | 25740 |
| 16 | 49074 |
| 17 | 81900 |
| 18 | 147756 |
| 19 | 251012 |