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) |
|---|---|
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 5 |
| 8 | -1 |
| 9 | 5 |
| 10 | -2 |
| 11 | 9 |
| 12 | 3 |
| 13 | 9 |
| 14 | -2 |
| 15 | 14 |
| 16 | -1 |
| 17 | 15 |
| 18 | 10 |
| 19 | 15 |
| 20 | 7 |
| 21 | 11 |
| 22 | 14 |
| 23 | 10 |
| 24 | 26 |
| 25 | 20 |
| 26 | 28 |
| 27 | 2 |
| 28 | 41 |
| 29 | -5 |
| 30 | 63 |
| 31 | -21 |
| 32 | 82 |
| 33 | -5 |
| 34 | 91 |
| 35 | -49 |
| 36 | 122 |
| 37 | -46 |
| 38 | 139 |
| 39 | -84 |
| 40 | 165 |
| 41 | -74 |
| 42 | 240 |
| 43 | -147 |
| 44 | 242 |
| 45 | -142 |
| 46 | 290 |
| 47 | -217 |
| 48 | 333 |
| 49 | -189 |
| 50 | 378 |
| 51 | -284 |
| 52 | 463 |
| 53 | -290 |
| 54 | 508 |
| 55 | -408 |
| 56 | 560 |
| 57 | -377 |