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 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 24 |
| 7 | 38 |
| 8 | 72 |
| 9 | 122 |
| 10 | 226 |
| 11 | 400 |
| 12 | 684 |
| 13 | 1246 |
| 14 | 2381 |
| 15 | 4384 |
| 16 | 8330 |
| 17 | 15839 |
| 18 | 30617 |
| 19 | 58764 |
| 20 | 113987 |
| 21 | 221994 |
| 22 | 434498 |
| 23 | 852036 |
| 24 | 1673320 |
| 25 | 3296641 |
| 26 | 6509179 |