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 | 4 |
| 4 | 6 |
| 5 | 9 |
| 6 | 15 |
| 7 | 18 |
| 8 | 33 |
| 9 | 138 |
| 10 | 204 |
| 11 | 219 |
| 12 | 267 |
| 13 | 1104 |
| 14 | 1408 |
| 15 | 1584 |
| 16 | 1956 |
| 17 | 17175 |
| 18 | 21147 |
| 19 | 24075 |
| 20 | 27396 |
| 21 | 27591 |
| 22 | 40095 |
| 23 | 354984 |
| 24 | 400989 |
| 25 | 916248 |
| 26 | 1145805 |
| 27 | 2541153 |
| 28 | 5414673 |