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 | -1 |
| 2 | 0 |
| 3 | 1 |
| 4 | -1 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | -2 |
| 10 | 2 |
| 11 | 0 |
| 12 | -3 |
| 13 | 4 |
| 14 | -3 |
| 15 | 1 |
| 16 | 1 |
| 17 | -4 |
| 18 | 9 |
| 19 | -10 |
| 20 | 2 |
| 21 | 11 |
| 22 | -19 |
| 23 | 16 |
| 24 | -7 |
| 25 | -5 |
| 26 | 22 |
| 27 | -40 |
| 28 | 43 |
| 29 | -13 |
| 30 | -42 |
| 31 | 86 |
| 32 | -87 |
| 33 | 44 |
| 34 | 24 |
| 35 | -106 |
| 36 | 183 |
| 37 | -195 |
| 38 | 74 |
| 39 | 163 |
| 40 | -382 |
| 41 | 430 |
| 42 | -256 |
| 43 | -86 |
| 44 | 504 |
| 45 | -859 |
| 46 | 907 |
| 47 | -395 |
| 48 | -639 |
| 49 | 1697 |
| 50 | -2084 |
| 51 | 1399 |
| 52 | 236 |
| 53 | -2313 |
| 54 | 4037 |
| 55 | -4301 |
| 56 | 2080 |
| 57 | 2529 |
| 58 | -7561 |
| 59 | 9923 |
| 60 | -7327 |