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 | -4 |
| 3 | 10 |
| 4 | 8 |
| 5 | -61 |
| 6 | 35 |
| 7 | 268 |
| 8 | -512 |
| 9 | -732 |
| 10 | 3525 |
| 11 | -645 |
| 12 | -17200 |
| 13 | 24682 |
| 14 | 57148 |
| 15 | -197113 |
| 16 | -46745 |
| 17 | 1064776 |
| 18 | -1085312 |
| 19 | -4088200 |
| 20 | 10626281 |
| 21 | 7664631 |
| 22 | -63798924 |
| 23 | 40190250 |
| 24 | 275842720 |
| 25 | -548257525 |
| 26 | -726966901 |
| 27 | 3703906996 |
| 28 | -893172736 |
| 29 | -17805071620 |
| 30 | 26701809197 |
| 31 | 57726469171 |
| 32 | -208147414040 |
| 33 | -35978050998 |
| 34 | 1107739781172 |
| 35 | -1193723409393 |
| 36 | -4172806133425 |