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 | 1 |
| 3 | 3 |
| 4 | -6 |
| 5 | 1 |
| 6 | 35 |
| 7 | -12 |
| 8 | -9 |
| 9 | 1 |
| 10 | 396 |
| 11 | -29 |
| 12 | -45 |
| 13 | -12 |
| 14 | 1 |
| 15 | 6237 |
| 16 | 582 |
| 17 | -462 |
| 18 | -96 |
| 19 | -15 |
| 20 | 1 |
| 21 | 131613 |
| 22 | 30684 |
| 23 | -6408 |
| 24 | -1534 |
| 25 | -165 |
| 26 | -18 |
| 27 | 1 |
| 28 | 3518993 |
| 29 | 1300810 |
| 30 | -96705 |
| 31 | -34020 |
| 32 | -3515 |
| 33 | -252 |
| 34 | -21 |
| 35 | 1 |
| 36 | 114244366 |
| 37 | 59124226 |
| 38 | -764835 |
| 39 | -944334 |
| 40 | -102180 |
| 41 | -6675 |
| 42 | -357 |
| 43 | -24 |
| 44 | 1 |