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 | -2 |
| 3 | -14 |
| 4 | -196 |
| 5 | -4508 |
| 6 | -153272 |
| 7 | -7203784 |
| 8 | -446634608 |
| 9 | -35284134032 |
| 10 | -3457845135136 |
| 11 | -411483571081184 |
| 12 | -58430667093528128 |
| 13 | -9757921404619197376 |
| 14 | -1893036752496124290944 |
| 15 | -422147195806635716880512 |
| 16 | -107225387734885472087650048 |