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 | -1 |
| 2 | -7 |
| 3 | -201 |
| 4 | -13351 |
| 5 | -1697705 |
| 6 | -369575303 |
| 7 | -127249900617 |
| 8 | -65286578868455 |
| 9 | -47651775381867241 |
| 10 | -47688241963081263175 |
| 11 | -63505249400026210723209 |
| 12 | -109775495351620406817045415 |
| 13 | -241236985075124408660287423529 |
| 14 | -662075390371447206867029299628807 |