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 | 0 |
| 2 | -3 |
| 3 | -1 |
| 4 | -8 |
| 5 | 2 |
| 6 | -9 |
| 7 | 15 |
| 8 | 0 |
| 9 | -17 |
| 10 | 25 |
| 11 | 4 |
| 12 | -19 |
| 13 | -44 |
| 14 | 20 |
| 15 | -9 |
| 16 | -40 |
| 17 | 54 |
| 18 | 19 |
| 19 | -18 |
| 20 | -57 |
| 21 | 71 |
| 22 | 28 |
| 23 | -17 |
| 24 | -64 |
| 25 | 104 |
| 26 | 53 |
| 27 | 0 |
| 28 | -55 |
| 29 | -112 |
| 30 | 100 |
| 31 | 39 |
| 32 | -24 |
| 33 | -89 |
| 34 | -156 |
| 35 | 106 |
| 36 | 35 |
| 37 | -38 |
| 38 | -113 |
| 39 | -190 |
| 40 | 128 |
| 41 | 47 |
| 42 | -36 |
| 43 | -121 |
| 44 | -208 |
| 45 | 172 |
| 46 | 81 |
| 47 | -12 |
| 48 | -107 |
| 49 | -204 |
| 50 | 244 |
| 51 | 143 |
| 52 | 40 |
| 53 | -65 |
| 54 | -172 |