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 | 0 |
| 3 | 1 |
| 4 | -5 |
| 5 | 4 |
| 6 | 1 |
| 7 | -6 |
| 8 | 9 |
| 9 | -3 |
| 10 | -7 |
| 11 | 15 |
| 12 | -12 |
| 13 | -4 |
| 14 | 22 |
| 15 | -27 |
| 16 | 8 |
| 17 | 26 |
| 18 | -49 |
| 19 | 35 |
| 20 | 18 |
| 21 | -75 |
| 22 | 84 |
| 23 | -17 |
| 24 | -93 |
| 25 | 159 |
| 26 | -101 |
| 27 | -76 |
| 28 | 252 |
| 29 | -260 |
| 30 | 25 |
| 31 | 328 |
| 32 | -512 |
| 33 | 285 |
| 34 | 303 |
| 35 | -840 |
| 36 | 797 |
| 37 | 18 |
| 38 | -1143 |
| 39 | 1637 |
| 40 | -779 |
| 41 | -1161 |
| 42 | 2780 |
| 43 | -2416 |
| 44 | -382 |
| 45 | 3941 |
| 46 | -5196 |
| 47 | 2034 |
| 48 | 4323 |
| 49 | -9137 |
| 50 | 7230 |
| 51 | 2289 |
| 52 | -13460 |
| 53 | 16367 |
| 54 | -4941 |
| 55 | -15749 |
| 56 | 29827 |
| 57 | -21308 |
| 58 | -10808 |