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 | 4 |
| 7 | 4 |
| 8 | 10 |
| 9 | 18 |
| 10 | 31 |
| 11 | 64 |
| 12 | 115 |
| 13 | 216 |
| 14 | 398 |
| 15 | 752 |
| 16 | 1413 |
| 17 | 2692 |
| 18 | 5092 |
| 19 | 9642 |
| 20 | 18355 |
| 21 | 35089 |
| 22 | 66907 |
| 23 | 128431 |
| 24 | 246479 |
| 25 | 473201 |
| 26 | 911650 |
| 27 | 1756523 |
| 28 | 3390156 |
| 29 | 6551387 |
| 30 | 12673576 |
| 31 | 24545135 |
| 32 | 47583812 |
| 33 | 92329094 |
| 34 | 179317195 |
| 35 | 348545465 |
| 36 | 678019818 |
| 37 | 1319938243 |
| 38 | 2571401536 |