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 | 32 |
| 2 | -34 |
| 3 | -68800 |
| 4 | -2093684 |
| 5 | 224163712 |
| 6 | 18248827144 |
| 7 | -839028775168 |
| 8 | -161999734633840 |
| 9 | 1917548044739072 |
| 10 | 1603923010615074784 |
| 11 | 31037878026343011328 |
| 12 | -17673243900695263973696 |
| 13 | -959600704244699318978560 |
| 14 | 212370574074332282486900864 |
| 15 | 21009464001651119352291258368 |