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 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 12 |
| 4 | 23 |
| 5 | 43 |
| 6 | 81 |
| 7 | 148 |
| 8 | 266 |
| 9 | 476 |
| 10 | 842 |
| 11 | 1478 |
| 12 | 2581 |
| 13 | 4481 |
| 14 | 7743 |
| 15 | 13328 |
| 16 | 22857 |
| 17 | 39073 |
| 18 | 66605 |
| 19 | 113242 |
| 20 | 192084 |
| 21 | 325128 |
| 22 | 549252 |
| 23 | 926220 |
| 24 | 1559353 |
| 25 | 2621295 |
| 26 | 4400249 |
| 27 | 7376868 |
| 28 | 12352043 |
| 29 | 20659159 |
| 30 | 34516377 |