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 | -13 |
| 2 | -90 |
| 3 | 9217 |
| 4 | 55710 |
| 5 | -4981093 |
| 6 | -89140770 |
| 7 | 44888581049 |
| 8 | 267408471870 |
| 9 | -43311229541203 |
| 10 | -1289870510004450 |
| 11 | 510720217693590307 |
| 12 | 9125841248810815230 |
| 13 | -2135177639698459001113 |
| 14 | -89022519968229449751330 |
| 15 | 192264573569779283298436633 |
| 16 | 1145162226463236921601433790 |