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 | 0 |
| 3 | -14 |
| 4 | 175 |
| 5 | 2211 |
| 6 | -400994 |
| 7 | 25610260 |
| 8 | 582496701 |
| 9 | -666933657755 |
| 10 | 166042332973276 |
| 11 | -14222991979095594 |
| 12 | -14297382182023795925 |
| 13 | 12622343477815735821511 |
| 14 | -5840589387156997753180230 |
| 15 | -443718496524920696265166664 |
| 16 | 5189349322544398120691167482361 |