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 | 16 |
| 2 | 108 |
| 3 | 480 |
| 4 | 1650 |
| 5 | 4752 |
| 6 | 12012 |
| 7 | 27456 |
| 8 | 57915 |
| 9 | 114400 |
| 10 | 213928 |
| 11 | 381888 |
| 12 | 655044 |
| 13 | 1085280 |
| 14 | 1744200 |
| 15 | 2728704 |
| 16 | 4167669 |
| 17 | 6229872 |
| 18 | 9133300 |
| 19 | 13156000 |
| 20 | 18648630 |
| 21 | 26048880 |
| 22 | 35897940 |
| 23 | 48859200 |
| 24 | 65739375 |
| 25 | 87512256 |
| 26 | 115345296 |
| 27 | 150629248 |
| 28 | 195011080 |
| 29 | 250430400 |
| 30 | 319159632 |