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 | 7 |
| 4 | -6 |
| 5 | 1 |
| 6 | -18 |
| 7 | 24 |
| 8 | -9 |
| 9 | 1 |
| 10 | 47 |
| 11 | -84 |
| 12 | 50 |
| 13 | -12 |
| 14 | 1 |
| 15 | -123 |
| 16 | 275 |
| 17 | -225 |
| 18 | 85 |
| 19 | -15 |
| 20 | 1 |
| 21 | 322 |
| 22 | -864 |
| 23 | 900 |
| 24 | -468 |
| 25 | 129 |
| 26 | -18 |
| 27 | 1 |
| 28 | -843 |
| 29 | 2639 |
| 30 | -3339 |
| 31 | 2219 |
| 32 | -840 |
| 33 | 182 |
| 34 | -21 |
| 35 | 1 |
| 36 | 2207 |
| 37 | -7896 |
| 38 | 11756 |
| 39 | -9528 |
| 40 | 4610 |
| 41 | -1368 |
| 42 | 244 |
| 43 | -24 |
| 44 | 1 |
| 45 | -5778 |
| 46 | 23256 |
| 47 | -39825 |
| 48 | 38121 |
| 49 | -22518 |
| 50 | 8532 |
| 51 | -2079 |
| 52 | 315 |
| 53 | -27 |
| 54 | 1 |
| 55 | 15127 |
| 56 | -67650 |
| 57 | 130975 |