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 | 7 |
| 3 | 13 |
| 4 | 20 |
| 5 | 35 |
| 6 | 66 |
| 7 | 118 |
| 8 | 218 |
| 9 | 402 |
| 10 | 738 |
| 11 | 1358 |
| 12 | 2498 |
| 13 | 4594 |
| 14 | 8450 |
| 15 | 15542 |
| 16 | 28586 |
| 17 | 52578 |
| 18 | 96706 |
| 19 | 177870 |
| 20 | 327154 |
| 21 | 601730 |
| 22 | 1106754 |
| 23 | 2035638 |
| 24 | 3744122 |
| 25 | 6886514 |
| 26 | 12666274 |
| 27 | 23296910 |
| 28 | 42849698 |
| 29 | 78812882 |
| 30 | 144959490 |
| 31 | 266622070 |