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 | -4 |
| 2 | 1 |
| 3 | 15 |
| 4 | -8 |
| 5 | 1 |
| 6 | -56 |
| 7 | 46 |
| 8 | -12 |
| 9 | 1 |
| 10 | 209 |
| 11 | -232 |
| 12 | 93 |
| 13 | -16 |
| 14 | 1 |
| 15 | -780 |
| 16 | 1091 |
| 17 | -592 |
| 18 | 156 |
| 19 | -20 |
| 20 | 1 |
| 21 | 2911 |
| 22 | -4912 |
| 23 | 3366 |
| 24 | -1200 |
| 25 | 235 |
| 26 | -24 |
| 27 | 1 |
| 28 | -10864 |
| 29 | 21468 |
| 30 | -17784 |
| 31 | 8010 |
| 32 | -2120 |
| 33 | 330 |
| 34 | -28 |
| 35 | 1 |
| 36 | 40545 |
| 37 | -91824 |
| 38 | 89238 |
| 39 | -48624 |
| 40 | 16255 |
| 41 | -3416 |
| 42 | 441 |
| 43 | -32 |
| 44 | 1 |
| 45 | -151316 |
| 46 | 386373 |