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) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | 37 |
| 4 | -967 |
| 5 | 42761 |
| 6 | -2840651 |
| 7 | 263226797 |
| 8 | -32337165967 |
| 9 | 5074716055825 |
| 10 | -988900430732179 |
| 11 | 233997381305743925 |
| 12 | -66026674478583179351 |
| 13 | 21886277194644477922841 |
| 14 | -8415820163884142193795547 |
| 15 | 3713857173311984258246440381 |
| 16 | -1863494782835471106307678337311 |