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 | 1 |
| 3 | 1 |
| 4 | -12 |
| 5 | 1 |
| 6 | 1 |
| 7 | 157 |
| 8 | 157 |
| 9 | 1 |
| 10 | 1 |
| 11 | -2040 |
| 12 | 26690 |
| 13 | -2040 |
| 14 | 1 |
| 15 | 1 |
| 16 | 26521 |
| 17 | 4508570 |
| 18 | 4508570 |
| 19 | 26521 |
| 20 | 1 |
| 21 | 1 |
| 22 | -344772 |
| 23 | 761974851 |
| 24 | -9900819720 |
| 25 | 761974851 |
| 26 | -344772 |
| 27 | 1 |
| 28 | 1 |
| 29 | 4482037 |
| 30 | 128773405047 |
| 31 | 21752862899691 |
| 32 | 21752862899691 |
| 33 | 128773405047 |
| 34 | 4482037 |
| 35 | 1 |