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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 7 |
| 6 | 16 |
| 7 | 35 |
| 8 | 74 |
| 9 | 153 |
| 10 | 312 |
| 11 | 629 |
| 12 | 1257 |
| 13 | 2495 |
| 14 | 4926 |
| 15 | 9684 |
| 16 | 18972 |
| 17 | 37064 |
| 18 | 72243 |
| 19 | 140547 |
| 20 | 273007 |
| 21 | 529626 |
| 22 | 1026369 |
| 23 | 1987260 |
| 24 | 3844919 |
| 25 | 7434542 |
| 26 | 14368115 |
| 27 | 27756229 |
| 28 | 53600223 |
| 29 | 103476920 |
| 30 | 199715716 |
| 31 | 385381128 |
| 32 | 743520256 |
| 33 | 1434272329 |
| 34 | 2766414007 |
| 35 | 5335290607 |