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 | -2 |
| 2 | 2 |
| 3 | -1 |
| 4 | -2 |
| 5 | 6 |
| 6 | -9 |
| 7 | 9 |
| 8 | -4 |
| 9 | -7 |
| 10 | 22 |
| 11 | -34 |
| 12 | 33 |
| 13 | -13 |
| 14 | -25 |
| 15 | 71 |
| 16 | -103 |
| 17 | 97 |
| 18 | -39 |
| 19 | -69 |
| 20 | 196 |
| 21 | -282 |
| 22 | 263 |
| 23 | -102 |
| 24 | -182 |
| 25 | 499 |
| 26 | -703 |
| 27 | 645 |
| 28 | -248 |
| 29 | -433 |
| 30 | 1181 |
| 31 | -1650 |
| 32 | 1499 |
| 33 | -568 |
| 34 | -988 |
| 35 | 2652 |
| 36 | -3660 |
| 37 | 3294 |
| 38 | -1240 |
| 39 | -2129 |
| 40 | 5681 |
| 41 | -7790 |
| 42 | 6960 |
| 43 | -2595 |
| 44 | -4438 |
| 45 | 11732 |
| 46 | -15959 |
| 47 | 14161 |
| 48 | -5252 |