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 | 48 |
| 2 | 1008 |
| 3 | 12144 |
| 4 | 92784 |
| 5 | 473760 |
| 6 | 1706544 |
| 7 | 4818048 |
| 8 | 12317040 |
| 9 | 29078832 |
| 10 | 59093280 |
| 11 | 114031296 |
| 12 | 219429552 |
| 13 | 367093536 |
| 14 | 621859968 |
| 15 | 1037221920 |
| 16 | 1583864688 |
| 17 | 2403178848 |
| 18 | 3747390192 |
| 19 | 5232056640 |
| 20 | 7550261280 |
| 21 | 10938344064 |
| 22 | 14714951616 |
| 23 | 19930041216 |
| 24 | 28075097520 |
| 25 | 35731471440 |