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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 11 |
| 6 | 20 |
| 7 | 36 |
| 8 | 64 |
| 9 | 117 |
| 10 | 209 |
| 11 | 381 |
| 12 | 699 |
| 13 | 1291 |
| 14 | 2387 |
| 15 | 4445 |
| 16 | 8317 |
| 17 | 15645 |
| 18 | 29494 |
| 19 | 55855 |
| 20 | 106021 |
| 21 | 201778 |
| 22 | 384941 |
| 23 | 735909 |
| 24 | 1409683 |
| 25 | 2705277 |
| 26 | 5200202 |