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 | 1 |
| 3 | -4 |
| 4 | 1 |
| 5 | -5 |
| 6 | 4 |
| 7 | 1 |
| 8 | -6 |
| 9 | 8 |
| 10 | 1 |
| 11 | -7 |
| 12 | 13 |
| 13 | -4 |
| 14 | 1 |
| 15 | -8 |
| 16 | 19 |
| 17 | -12 |
| 18 | 1 |
| 19 | -9 |
| 20 | 26 |
| 21 | -25 |
| 22 | 4 |
| 23 | 1 |
| 24 | -10 |
| 25 | 34 |
| 26 | -44 |
| 27 | 16 |
| 28 | 1 |
| 29 | -11 |
| 30 | 43 |
| 31 | -70 |
| 32 | 41 |
| 33 | -4 |
| 34 | 1 |
| 35 | -12 |
| 36 | 53 |
| 37 | -104 |
| 38 | 85 |
| 39 | -20 |
| 40 | 1 |
| 41 | -13 |
| 42 | 64 |
| 43 | -147 |
| 44 | 155 |
| 45 | -61 |
| 46 | 4 |
| 47 | 1 |
| 48 | -14 |
| 49 | 76 |
| 50 | -200 |
| 51 | 259 |
| 52 | -146 |
| 53 | 24 |