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 | 1 |
| 2 | 63 |
| 3 | 364 |
| 4 | 2016 |
| 5 | 3906 |
| 6 | 22932 |
| 7 | 19608 |
| 8 | 64512 |
| 9 | 88452 |
| 10 | 246078 |
| 11 | 177156 |
| 12 | 733824 |
| 13 | 402234 |
| 14 | 1235304 |
| 15 | 1421784 |
| 16 | 2064384 |
| 17 | 1508598 |
| 18 | 5572476 |
| 19 | 2613660 |
| 20 | 7874496 |
| 21 | 7137312 |
| 22 | 11160828 |
| 23 | 6728904 |
| 24 | 23482368 |
| 25 | 12206250 |
| 26 | 25340742 |
| 27 | 21493836 |
| 28 | 39529728 |
| 29 | 21243690 |
| 30 | 89572392 |