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 | -8 |
| 2 | 101 |
| 3 | -1840 |
| 4 | 44441 |
| 5 | -1340696 |
| 6 | 48530653 |
| 7 | -2049479216 |
| 8 | 98915010545 |
| 9 | -5370730092136 |
| 10 | 324012625790741 |
| 11 | -21502216185516848 |
| 12 | 1556657523678767881 |
| 13 | -122085765970981019000 |
| 14 | 10311495889448094131981 |
| 15 | -933128678308256836233136 |
| 16 | 90072066063382006331898593 |