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 | -26 |
| 3 | 1 |
| 4 | 1 |
| 5 | -120 |
| 6 | 1192 |
| 7 | -120 |
| 8 | 1 |
| 9 | 1 |
| 10 | -502 |
| 11 | 14609 |
| 12 | -88736 |
| 13 | 14609 |
| 14 | -502 |
| 15 | 1 |
| 16 | 1 |
| 17 | -2036 |
| 18 | 152638 |
| 19 | -2205524 |
| 20 | 9890752 |
| 21 | -2205524 |
| 22 | 152638 |
| 23 | -2036 |
| 24 | 1 |
| 25 | 1 |
| 26 | -8178 |
| 27 | 1479727 |
| 28 | -45541628 |
| 29 | 424761262 |
| 30 | -1551163136 |
| 31 | 424761262 |
| 32 | -45541628 |
| 33 | 1479727 |
| 34 | -8178 |
| 35 | 1 |