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 | 1 |
| 3 | 4 |
| 4 | 5 |
| 5 | 21 |
| 6 | 31 |
| 7 | 113 |
| 8 | 177 |
| 9 | 766 |
| 10 | 1271 |
| 11 | 4687 |
| 12 | 7999 |
| 13 | 34412 |
| 14 | 60166 |
| 15 | 225891 |
| 16 | 401201 |
| 17 | 1702653 |
| 18 | 3064183 |
| 19 | 11646431 |
| 20 | 21171246 |
| 21 | 88894429 |
| 22 | 162966750 |
| 23 | 624746839 |
| 24 | 1153324813 |
| 25 | 4805206256 |
| 26 | 8923870307 |
| 27 | 34421146489 |
| 28 | 64252106507 |
| 29 | 266183327326 |