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 | 1 |
| 4 | 1 |
| 5 | -2 |
| 6 | 1 |
| 7 | -2 |
| 8 | 4 |
| 9 | -3 |
| 10 | 1 |
| 11 | 4 |
| 12 | -8 |
| 13 | 7 |
| 14 | -4 |
| 15 | 1 |
| 16 | -7 |
| 17 | 14 |
| 18 | -14 |
| 19 | 11 |
| 20 | -5 |
| 21 | 1 |
| 22 | 11 |
| 23 | -22 |
| 24 | 25 |
| 25 | -25 |
| 26 | 16 |
| 27 | -6 |
| 28 | 1 |
| 29 | -18 |
| 30 | 36 |
| 31 | -44 |
| 32 | 51 |
| 33 | -41 |
| 34 | 22 |
| 35 | -7 |
| 36 | 1 |
| 37 | 35 |
| 38 | -70 |
| 39 | 83 |
| 40 | -99 |
| 41 | 92 |
| 42 | -63 |
| 43 | 29 |
| 44 | -8 |
| 45 | 1 |
| 46 | -76 |
| 47 | 152 |
| 48 | -166 |
| 49 | 188 |
| 50 | -190 |
| 51 | 155 |
| 52 | -92 |
| 53 | 37 |
| 54 | -9 |
| 55 | 1 |
| 56 | 166 |
| 57 | -332 |
| 58 | 337 |
| 59 | -354 |
| 60 | 373 |
| 61 | -345 |
| 62 | 247 |
| 63 | -129 |
| 64 | 46 |