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) |
|---|---|
| 6 | 3 |
| 7 | 27 |
| 8 | 189 |
| 9 | 1134 |
| 10 | 6123 |
| 11 | 30618 |
| 12 | 144342 |
| 13 | 649539 |
| 14 | 2814669 |
| 15 | 11821608 |
| 16 | 48361131 |
| 17 | 193444524 |
| 18 | 758897748 |
| 19 | 2927177028 |
| 20 | 11123272701 |
| 21 | 41712272649 |
| 22 | 154580775111 |
| 23 | 566796175407 |
| 24 | 2058365058057 |
| 25 | 7410114208989 |
| 26 | 26464693603590 |
| 27 | 93829368230910 |