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 | 14 |
| 2 | -254 |
| 3 | -16156 |
| 4 | 116716 |
| 5 | 30714824 |
| 6 | 167396536 |
| 7 | -80586473296 |
| 8 | -1655509714544 |
| 9 | 266934167861984 |
| 10 | 10441892693970976 |
| 11 | -1055017257663334336 |
| 12 | -66457610442443011904 |
| 13 | 4766686645187803247744 |
| 14 | 455510634120920865106816 |
| 15 | -23652976986990268349291776 |