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 | 1 |
| 1 | 8 |
| 2 | 44 |
| 3 | 192 |
| 4 | 726 |
| 5 | 2464 |
| 6 | 7704 |
| 7 | 22521 |
| 8 | 62281 |
| 9 | 164252 |
| 10 | 415796 |
| 11 | 1015334 |
| 12 | 2401462 |
| 13 | 5519640 |
| 14 | 12363062 |
| 15 | 27047913 |
| 16 | 57917068 |
| 17 | 121588588 |
| 18 | 250638216 |
| 19 | 507974950 |
| 20 | 1013409244 |
| 21 | 1992161935 |
| 22 | 3862461694 |
| 23 | 7392045512 |
| 24 | 13975011909 |
| 25 | 26116935550 |
| 26 | 48277368020 |
| 27 | 88320521108 |
| 28 | 159993054081 |