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 | -11 |
| 2 | -75 |
| 3 | 5137 |
| 4 | 64425 |
| 5 | -8116691 |
| 6 | -151949475 |
| 7 | 27061582537 |
| 8 | 675202758225 |
| 9 | -154763675249051 |
| 10 | -4826608715002875 |
| 11 | 1352304080132324737 |
| 12 | 50608880246719532025 |
| 13 | -16757717498380017159011 |
| 14 | -731667579810789300424275 |
| 15 | 279544164877458293190983737 |
| 16 | 13948943072618103594908145825 |