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 | 52 |
| 2 | 782 |
| 3 | -159224 |
| 4 | -12788660 |
| 5 | 559103792 |
| 6 | 151972419784 |
| 7 | 1454980899424 |
| 8 | -1968977929003888 |
| 9 | -124758638617745600 |
| 10 | 27571931007786483424 |
| 11 | 3831601446637967570048 |
| 12 | -383682490141447518907712 |
| 13 | -108323545252613355018788096 |
| 14 | 3953866345538313246451111040 |