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 | 5 |
| 2 | -367 |
| 3 | -5755 |
| 4 | 402817 |
| 5 | 11037925 |
| 6 | -734331695 |
| 7 | -29632858075 |
| 8 | 1866841880705 |
| 9 | 102262852326725 |
| 10 | -6074903893493615 |
| 11 | -431244900588230075 |
| 12 | 24038761085803317505 |
| 13 | 2148769817796050860325 |
| 14 | -111757677404273451703855 |
| 15 | -12351237147086094379982875 |
| 16 | 595378957401697424118753025 |