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 | -1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | -1 |
| 8 | 0 |
| 9 | 0 |
| 10 | 1 |
| 11 | -3 |
| 12 | 2 |
| 13 | 0 |
| 14 | 3 |
| 15 | -1 |
| 16 | -2 |
| 17 | -10 |
| 18 | 8 |
| 19 | 5 |
| 20 | 8 |
| 21 | -6 |
| 22 | -3 |
| 23 | -24 |
| 24 | 17 |
| 25 | 8 |
| 26 | 12 |
| 27 | -15 |
| 28 | 19 |
| 29 | -37 |
| 30 | 18 |
| 31 | -29 |
| 32 | 18 |
| 33 | 3 |
| 34 | 109 |
| 35 | -72 |
| 36 | -28 |
| 37 | -153 |
| 38 | 46 |
| 39 | 72 |
| 40 | 335 |
| 41 | -165 |
| 42 | -86 |
| 43 | -346 |
| 44 | 84 |
| 45 | -34 |
| 46 | 650 |
| 47 | -224 |
| 48 | 245 |
| 49 | -492 |
| 50 | -69 |
| 51 | -1054 |
| 52 | 966 |
| 53 | 161 |