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 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 1 |
| 8 | 9 |
| 9 | 10 |
| 10 | 20 |
| 11 | 42 |
| 12 | 64 |
| 13 | 126 |
| 14 | 251 |
| 15 | 440 |
| 16 | 828 |
| 17 | 1560 |
| 18 | 2967 |
| 19 | 5656 |
| 20 | 10769 |
| 21 | 20419 |
| 22 | 39327 |
| 23 | 74826 |
| 24 | 143516 |
| 25 | 276217 |
| 26 | 531587 |
| 27 | 1025104 |
| 28 | 1977596 |
| 29 | 3821827 |
| 30 | 7396083 |
| 31 | 14326142 |
| 32 | 27774012 |
| 33 | 53875302 |
| 34 | 104653661 |
| 35 | 203380716 |