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 | 8 |
| 2 | 16 |
| 3 | 72 |
| 4 | 212 |
| 5 | 786 |
| 6 | 2594 |
| 7 | 9110 |
| 8 | 31062 |
| 9 | 107510 |
| 10 | 369596 |
| 11 | 1274760 |
| 12 | 4390640 |
| 13 | 15132044 |
| 14 | 52139518 |
| 15 | 179669784 |
| 16 | 619118588 |
| 17 | 2133406676 |
| 18 | 7351495186 |
| 19 | 25332356634 |
| 20 | 87292564824 |
| 21 | 300799972600 |
| 22 | 1036523262982 |
| 23 | 3571740490936 |
| 24 | 12307815695422 |