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 | 4 |
| 2 | 6 |
| 3 | 12 |
| 4 | 20 |
| 5 | 34 |
| 6 | 56 |
| 7 | 92 |
| 8 | 150 |
| 9 | 244 |
| 10 | 396 |
| 11 | 642 |
| 12 | 1040 |
| 13 | 1684 |
| 14 | 2726 |
| 15 | 4412 |
| 16 | 7140 |
| 17 | 11554 |
| 18 | 18696 |
| 19 | 30252 |
| 20 | 48950 |
| 21 | 79204 |
| 22 | 128156 |
| 23 | 207362 |
| 24 | 335520 |
| 25 | 542884 |
| 26 | 878406 |
| 27 | 1421292 |
| 28 | 2299700 |
| 29 | 3720994 |
| 30 | 6020696 |
| 31 | 9741692 |
| 32 | 15762390 |
| 33 | 25504084 |
| 34 | 41266476 |
| 35 | 66770562 |
| 36 | 108037040 |