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 | 2 |
| 4 | 1 |
| 5 | 9 |
| 6 | 14 |
| 7 | 24 |
| 8 | 43 |
| 9 | 108 |
| 10 | 227 |
| 11 | 440 |
| 12 | 817 |
| 13 | 1580 |
| 14 | 3123 |
| 15 | 6209 |
| 16 | 12462 |
| 17 | 25536 |
| 18 | 52744 |
| 19 | 107911 |
| 20 | 216702 |
| 21 | 427673 |
| 22 | 835023 |
| 23 | 1627607 |
| 24 | 3195179 |
| 25 | 6352470 |
| 26 | 12792446 |
| 27 | 25977145 |
| 28 | 52859412 |
| 29 | 107195861 |
| 30 | 215970512 |
| 31 | 432053205 |
| 32 | 859546186 |
| 33 | 1705026253 |
| 34 | 3381411667 |
| 35 | 6718113104 |