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 | 918 |
| 3 | 6624 |
| 4 | 36450 |
| 5 | 120096 |
| 6 | 322436 |
| 7 | 764640 |
| 8 | 1637766 |
| 9 | 2912544 |
| 10 | 5591592 |
| 11 | 9160992 |
| 12 | 14668002 |
| 13 | 22913280 |
| 14 | 35544420 |
| 15 | 48529440 |
| 16 | 74114514 |
| 17 | 100230912 |
| 18 | 136486530 |
| 19 | 184801824 |
| 20 | 252809100 |
| 21 | 308852640 |
| 22 | 426995388 |
| 23 | 528491520 |
| 24 | 664053284 |
| 25 | 836215488 |
| 26 | 1070501400 |
| 27 | 1229873472 |