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 | 0 |
| 2 | 906 |
| 3 | 6144 |
| 4 | 38424 |
| 5 | 102400 |
| 6 | 359344 |
| 7 | 651264 |
| 8 | 1743434 |
| 9 | 2596864 |
| 10 | 5956560 |
| 11 | 7829504 |
| 12 | 16232208 |
| 13 | 19574784 |
| 14 | 37960640 |
| 15 | 43102208 |
| 16 | 78860184 |
| 17 | 85909504 |
| 18 | 150986202 |
| 19 | 157845504 |
| 20 | 269942480 |
| 21 | 274096128 |
| 22 | 454718160 |
| 23 | 452882432 |
| 24 | 734667440 |
| 25 | 714375168 |