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) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 2 |
| 4 | -3 |
| 5 | 3 |
| 6 | -4 |
| 7 | 8 |
| 8 | -9 |
| 9 | 6 |
| 10 | -9 |
| 11 | 14 |
| 12 | -15 |
| 13 | 16 |
| 14 | -17 |
| 15 | 27 |
| 16 | -33 |
| 17 | 21 |
| 18 | -22 |
| 19 | 36 |
| 20 | -37 |
| 21 | 34 |
| 22 | -45 |
| 23 | 61 |
| 24 | -62 |
| 25 | 51 |
| 26 | -55 |
| 27 | 73 |
| 28 | -82 |
| 29 | 76 |
| 30 | -77 |
| 31 | 124 |
| 32 | -125 |
| 33 | 80 |
| 34 | -97 |
| 35 | 120 |
| 36 | -132 |
| 37 | 132 |
| 38 | -133 |
| 39 | 171 |
| 40 | -190 |
| 41 | 153 |
| 42 | -154 |
| 43 | 221 |
| 44 | -222 |
| 45 | 194 |
| 46 | -233 |
| 47 | 296 |
| 48 | -297 |
| 49 | 239 |
| 50 | -248 |
| 51 | 313 |
| 52 | -337 |
| 53 | 301 |
| 54 | -302 |