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 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 17 |
| 5 | 36 |
| 6 | 76 |
| 7 | 160 |
| 8 | 337 |
| 9 | 710 |
| 10 | 1496 |
| 11 | 3152 |
| 12 | 6641 |
| 13 | 13992 |
| 14 | 29480 |
| 15 | 62112 |
| 16 | 130865 |
| 17 | 275722 |
| 18 | 580924 |
| 19 | 1223960 |
| 20 | 2578785 |
| 21 | 5433292 |
| 22 | 11447508 |
| 23 | 24118976 |
| 24 | 50816737 |
| 25 | 107066766 |
| 26 | 225581040 |
| 27 | 475281056 |
| 28 | 1001378849 |