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 | 3 |
| 2 | 25 |
| 3 | 162 |
| 4 | 969 |
| 5 | 5613 |
| 6 | 32062 |
| 7 | 181989 |
| 8 | 1030017 |
| 9 | 5821902 |
| 10 | 32886505 |
| 11 | 185714829 |
| 12 | 1048619646 |
| 13 | 5920559661 |
| 14 | 33426829321 |
| 15 | 188721717102 |
| 16 | 1065481514817 |
| 17 | 6015458406741 |
| 18 | 33961820796094 |
| 19 | 191740095366885 |
| 20 | 1082517159435249 |
| 21 | 6111623364952302 |
| 22 | 34504707439240921 |