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) |
|---|---|
| 8 | 1 |
| 9 | 24 |
| 10 | 300 |
| 11 | 2624 |
| 12 | 18126 |
| 13 | 105552 |
| 14 | 539408 |
| 15 | 2485016 |
| 16 | 10518477 |
| 17 | 41482336 |
| 18 | 154055260 |
| 19 | 543239064 |
| 20 | 1830924554 |
| 21 | 5929728456 |
| 22 | 18534968236 |
| 23 | 56121729792 |
| 24 | 165117049094 |
| 25 | 473276306552 |
| 26 | 1324582728412 |
| 27 | 3626879184272 |
| 28 | 9732325392280 |
| 29 | 25631811881168 |
| 30 | 66342981204768 |