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) |
|---|---|
| 0 | 3 |
| 1 | 19 |
| 2 | 163 |
| 3 | 1459 |
| 4 | 13123 |
| 5 | 118099 |
| 6 | 1062883 |
| 7 | 9565939 |
| 8 | 86093443 |
| 9 | 774840979 |
| 10 | 6973568803 |
| 11 | 62762119219 |
| 12 | 564859072963 |
| 13 | 5083731656659 |
| 14 | 45753584909923 |
| 15 | 411782264189299 |
| 16 | 3706040377703683 |
| 17 | 33354363399333139 |
| 18 | 300189270593998243 |