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 | -2 |
| 3 | 1 |
| 4 | 5 |
| 5 | -5 |
| 6 | 1 |
| 7 | -13 |
| 8 | 19 |
| 9 | -8 |
| 10 | 1 |
| 11 | 34 |
| 12 | -65 |
| 13 | 42 |
| 14 | -11 |
| 15 | 1 |
| 16 | -89 |
| 17 | 210 |
| 18 | -183 |
| 19 | 74 |
| 20 | -14 |
| 21 | 1 |
| 22 | 233 |
| 23 | -654 |
| 24 | 717 |
| 25 | -394 |
| 26 | 115 |
| 27 | -17 |
| 28 | 1 |
| 29 | -610 |
| 30 | 1985 |
| 31 | -2622 |
| 32 | 1825 |
| 33 | -725 |
| 34 | 165 |
| 35 | -20 |
| 36 | 1 |
| 37 | 1597 |
| 38 | -5911 |
| 39 | 9134 |
| 40 | -7703 |
| 41 | 3885 |
| 42 | -1203 |
| 43 | 224 |
| 44 | -23 |
| 45 | 1 |