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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 21 |
| 6 | 40 |
| 7 | 63 |
| 8 | 105 |
| 9 | 159 |
| 10 | 245 |
| 11 | 355 |
| 12 | 526 |
| 13 | 739 |
| 14 | 1052 |
| 15 | 1452 |
| 16 | 2011 |
| 17 | 2718 |
| 18 | 3691 |
| 19 | 4909 |
| 20 | 6546 |