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 | 264 |
| 2 | 7944 |
| 3 | 64416 |
| 4 | 253704 |
| 5 | 825264 |
| 6 | 1938336 |
| 7 | 4437312 |
| 8 | 8118024 |
| 9 | 15653352 |
| 10 | 24832944 |
| 11 | 42517728 |
| 12 | 61903776 |
| 13 | 98021616 |
| 14 | 133522752 |
| 15 | 201364416 |
| 16 | 259776264 |
| 17 | 374842512 |
| 18 | 471023592 |
| 19 | 653690400 |
| 20 | 793078704 |
| 21 | 1082704128 |
| 22 | 1279397088 |
| 23 | 1699194816 |
| 24 | 1980797856 |
| 25 | 2578950264 |
| 26 | 2949559536 |