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 | -9 |
| 3 | -919 |
| 4 | 917271 |
| 5 | 9174563561 |
| 6 | -917438025443049 |
| 7 | -917439860513400673559 |
| 8 | 9174396770273536422744011031 |
| 9 | 917439695376166450708460281823359721 |
| 10 | -917439693541287252616828116888122637934368489 |