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 | -15 |
| 7 | 23 |
| 8 | -9 |
| 9 | 1 |
| 10 | 31 |
| 11 | -72 |
| 12 | 48 |
| 13 | -12 |
| 14 | 1 |
| 15 | -63 |
| 16 | 201 |
| 17 | -198 |
| 18 | 82 |
| 19 | -15 |
| 20 | 1 |
| 21 | 127 |
| 22 | -522 |
| 23 | 699 |
| 24 | -420 |
| 25 | 125 |
| 26 | -18 |
| 27 | 1 |
| 28 | -255 |
| 29 | 1291 |
| 30 | -2223 |
| 31 | 1795 |
| 32 | -765 |
| 33 | 177 |
| 34 | -21 |
| 35 | 1 |
| 36 | 511 |
| 37 | -3084 |
| 38 | 6562 |
| 39 | -6768 |
| 40 | 3840 |
| 41 | -1260 |
| 42 | 238 |
| 43 | -24 |
| 44 | 1 |
| 45 | -1023 |
| 46 | 7181 |
| 47 | -18324 |
| 48 | 23276 |
| 49 | -16758 |
| 50 | 7266 |
| 51 | -1932 |
| 52 | 308 |
| 53 | -27 |
| 54 | 1 |
| 55 | 2047 |
| 56 | -16398 |
| 57 | 49029 |
| 58 | -74616 |
| 59 | 65870 |