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 | -3 |
| 2 | -27 |
| 3 | 159 |
| 4 | -219 |
| 5 | -378 |
| 6 | 1431 |
| 7 | -1032 |
| 8 | -1755 |
| 9 | 4533 |
| 10 | -3402 |
| 11 | -3996 |
| 12 | 11607 |
| 13 | -6594 |
| 14 | -9288 |
| 15 | 20034 |
| 16 | -14043 |
| 17 | -14742 |
| 18 | 40797 |
| 19 | -20580 |
| 20 | -27594 |
| 21 | 54696 |
| 22 | -35964 |
| 23 | -36504 |
| 24 | 93015 |
| 25 | -47253 |
| 26 | -59346 |
| 27 | 122631 |
| 28 | -75336 |
| 29 | -73170 |
| 30 | 180306 |
| 31 | -89376 |
| 32 | -112347 |
| 33 | 211788 |
| 34 | -132678 |
| 35 | -130032 |