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 | 10 |
| 2 | -1582 |
| 3 | -49460 |
| 4 | 7488172 |
| 5 | 407648600 |
| 6 | -58899040520 |
| 7 | -4702980076400 |
| 8 | 646447502318480 |
| 9 | 69747774931223200 |
| 10 | -9088444540784918240 |
| 11 | -1264042019751023406400 |
| 12 | 155513980696092323212480 |
| 13 | 27068563933615579666902400 |
| 14 | -3129783062564598942695063680 |