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 | -1 |
| 2 | -1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 4 |
| 9 | 6 |
| 10 | 6 |
| 11 | 8 |
| 12 | 9 |
| 13 | 10 |
| 14 | 10 |
| 15 | 11 |
| 16 | 10 |
| 17 | 10 |
| 18 | 8 |
| 19 | 6 |
| 20 | 2 |
| 21 | 0 |
| 22 | -7 |
| 23 | -12 |
| 24 | -20 |
| 25 | -28 |
| 26 | -39 |
| 27 | -48 |
| 28 | -62 |
| 29 | -74 |
| 30 | -90 |
| 31 | -104 |
| 32 | -122 |
| 33 | -136 |
| 34 | -156 |
| 35 | -171 |
| 36 | -190 |
| 37 | -204 |
| 38 | -222 |
| 39 | -232 |
| 40 | -247 |
| 41 | -252 |
| 42 | -260 |
| 43 | -258 |
| 44 | -258 |
| 45 | -244 |
| 46 | -232 |
| 47 | -204 |
| 48 | -176 |
| 49 | -130 |
| 50 | -84 |
| 51 | -15 |
| 52 | 54 |
| 53 | 148 |
| 54 | 244 |
| 55 | 368 |