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 | -6 |
| 2 | -41652 |
| 3 | -11504904 |
| 4 | -4378103178 |
| 5 | -1652544433080 |
| 6 | -700184843900712 |
| 7 | -302796005909941632 |
| 8 | -136251754253507319300 |
| 9 | -62421509259448987324542 |
| 10 | -29147951871527035454309160 |
| 11 | -13787807362002100397282325912 |