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 | 0 |
| 1 | -1 |
| 2 | -1 |
| 3 | -1 |
| 4 | -1 |
| 5 | -1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 2 |
| 10 | 3 |
| 11 | 4 |
| 12 | 6 |
| 13 | 7 |
| 14 | 9 |
| 15 | 10 |
| 16 | 12 |
| 17 | 13 |
| 18 | 15 |
| 19 | 15 |
| 20 | 16 |
| 21 | 16 |
| 22 | 16 |
| 23 | 14 |
| 24 | 13 |
| 25 | 9 |
| 26 | 6 |
| 27 | 0 |
| 28 | -5 |
| 29 | -14 |
| 30 | -22 |
| 31 | -34 |
| 32 | -45 |
| 33 | -60 |
| 34 | -74 |
| 35 | -93 |
| 36 | -110 |
| 37 | -132 |
| 38 | -152 |
| 39 | -177 |
| 40 | -199 |
| 41 | -226 |
| 42 | -249 |
| 43 | -277 |
| 44 | -300 |
| 45 | -328 |
| 46 | -348 |
| 47 | -373 |
| 48 | -389 |
| 49 | -408 |
| 50 | -417 |
| 51 | -428 |
| 52 | -425 |
| 53 | -424 |
| 54 | -407 |
| 55 | -389 |
| 56 | -352 |