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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 18 |
| 6 | 50 |
| 7 | 135 |
| 8 | 385 |
| 9 | 1065 |
| 10 | 3053 |
| 11 | 8701 |
| 12 | 25579 |
| 13 | 73693 |
| 14 | 217718 |
| 15 | 635220 |
| 16 | 1888802 |