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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 4 |
| 8 | 11 |
| 9 | 28 |
| 10 | 60 |
| 11 | 131 |
| 12 | 263 |
| 13 | 530 |
| 14 | 1029 |
| 15 | 2009 |
| 16 | 3853 |
| 17 | 7414 |
| 18 | 14152 |
| 19 | 27105 |
| 20 | 51755 |
| 21 | 99069 |
| 22 | 189558 |
| 23 | 363468 |
| 24 | 697302 |
| 25 | 1340220 |
| 26 | 2578362 |
| 27 | 4968001 |
| 28 | 9582682 |
| 29 | 18508226 |
| 30 | 35784670 |
| 31 | 69266825 |
| 32 | 134207336 |
| 33 | 260290846 |
| 34 | 505274108 |
| 35 | 981691926 |