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) |
|---|---|
| 5 | 1 |
| 6 | -29127 |
| 7 | 969583737 |
| 8 | -31709385606535 |
| 9 | 1039306892330748537 |
| 10 | -34054968941001637311879 |
| 11 | 1115917479276007905665796729 |
| 12 | -36566366524181816928510601278855 |