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 | 2 |
| 3 | 2 |
| 4 | 8 |
| 5 | 14 |
| 6 | 32 |
| 7 | 62 |
| 8 | 130 |
| 9 | 254 |
| 10 | 528 |
| 11 | 1038 |
| 12 | 2102 |
| 13 | 4194 |
| 14 | 8436 |
| 15 | 16826 |
| 16 | 33756 |
| 17 | 67438 |
| 18 | 135076 |
| 19 | 270022 |
| 20 | 540410 |
| 21 | 1080542 |
| 22 | 2161904 |
| 23 | 4323226 |
| 24 | 8647964 |
| 25 | 17294978 |
| 26 | 34592956 |
| 27 | 69183794 |
| 28 | 138373842 |
| 29 | 276743558 |
| 30 | 553499312 |
| 31 | 1106990758 |
| 32 | 2214005762 |
| 33 | 4427995526 |
| 34 | 8856040664 |