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 | 7 |
| 5 | 14 |
| 6 | 31 |
| 7 | 63 |
| 8 | 141 |
| 9 | 297 |
| 10 | 649 |
| 11 | 1391 |
| 12 | 3026 |
| 13 | 6539 |
| 14 | 14187 |
| 15 | 30619 |
| 16 | 66172 |
| 17 | 142667 |
| 18 | 307883 |
| 19 | 663506 |
| 20 | 1429816 |
| 21 | 3077752 |
| 22 | 6622351 |