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 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 4 |
| 8 | 6 |
| 9 | 16 |
| 10 | 25 |
| 11 | 52 |
| 12 | 89 |
| 13 | 175 |
| 14 | 308 |
| 15 | 593 |
| 16 | 1066 |
| 17 | 2031 |
| 18 | 3743 |
| 19 | 7124 |
| 20 | 13330 |
| 21 | 25445 |
| 22 | 48134 |
| 23 | 92160 |
| 24 | 175743 |
| 25 | 337541 |
| 26 | 647269 |
| 27 | 1246802 |
| 28 | 2400776 |
| 29 | 4636319 |
| 30 | 8955984 |
| 31 | 17334720 |
| 32 | 33570730 |
| 33 | 65107971 |
| 34 | 126355239 |
| 35 | 245492141 |
| 36 | 477284073 |