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 | 3 |
| 3 | -2 |
| 4 | -1 |
| 5 | 4 |
| 6 | -6 |
| 7 | 6 |
| 8 | -3 |
| 9 | -2 |
| 10 | 9 |
| 11 | -16 |
| 12 | 17 |
| 13 | -10 |
| 14 | -5 |
| 15 | 24 |
| 16 | -36 |
| 17 | 36 |
| 18 | -21 |
| 19 | -10 |
| 20 | 46 |
| 21 | -74 |
| 22 | 77 |
| 23 | -42 |
| 24 | -22 |
| 25 | 94 |
| 26 | -144 |
| 27 | 142 |
| 28 | -78 |
| 29 | -38 |
| 30 | 172 |
| 31 | -266 |
| 32 | 266 |
| 33 | -146 |
| 34 | -73 |
| 35 | 312 |
| 36 | -471 |
| 37 | 464 |
| 38 | -251 |
| 39 | -122 |
| 40 | 534 |
| 41 | -814 |
| 42 | 801 |
| 43 | -432 |
| 44 | -213 |
| 45 | 910 |
| 46 | -1364 |
| 47 | 1328 |
| 48 | -713 |
| 49 | -344 |
| 50 | 1485 |
| 51 | -2234 |
| 52 | 2178 |