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 | -12 |
| 2 | -12 |
| 3 | 66 |
| 4 | 144 |
| 5 | 66 |
| 6 | -232 |
| 7 | -792 |
| 8 | -792 |
| 9 | -232 |
| 10 | 639 |
| 11 | 2784 |
| 12 | 4356 |
| 13 | 2784 |
| 14 | 639 |
| 15 | -1596 |
| 16 | -7668 |
| 17 | -15312 |
| 18 | -15312 |
| 19 | -7668 |
| 20 | -1596 |
| 21 | 3774 |
| 22 | 19152 |
| 23 | 42174 |
| 24 | 53824 |
| 25 | 42174 |
| 26 | 19152 |
| 27 | 3774 |
| 28 | -8328 |
| 29 | -45288 |
| 30 | -105336 |
| 31 | -146248 |
| 32 | -146248 |
| 33 | -105336 |
| 34 | -45288 |
| 35 | -8328 |
| 36 | 17283 |