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 | 2 |
| 4 | 1 |
| 5 | 1 |
| 6 | 8 |
| 7 | 36 |
| 8 | 115 |
| 9 | 307 |
| 10 | 738 |
| 11 | 1662 |
| 12 | 3589 |
| 13 | 7541 |
| 14 | 15564 |
| 15 | 31752 |
| 16 | 64295 |
| 17 | 129575 |
| 18 | 260358 |
| 19 | 522178 |
| 20 | 1046105 |
| 21 | 2094281 |
| 22 | 4190992 |
| 23 | 8384812 |
| 24 | 16772891 |
| 25 | 33549531 |
| 26 | 67103338 |
| 27 | 134211526 |
| 28 | 268428525 |
| 29 | 536863197 |
| 30 | 1073733268 |
| 31 | 2147474192 |