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 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 23 |
| 5 | 66 |
| 6 | 192 |
| 7 | 575 |
| 8 | 1739 |
| 9 | 5307 |
| 10 | 16304 |
| 11 | 50381 |
| 12 | 156408 |
| 13 | 487398 |
| 14 | 1523663 |
| 15 | 4776107 |
| 16 | 15006513 |
| 17 | 47247134 |
| 18 | 149023605 |
| 19 | 470794024 |
| 20 | 1489462276 |
| 21 | 4718330397 |
| 22 | 14964219411 |
| 23 | 47509518289 |
| 24 | 150982994162 |
| 25 | 480243297965 |
| 26 | 1528796563830 |
| 27 | 4870415108094 |