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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | -1 |
| 4 | -4 |
| 5 | -9 |
| 6 | -17 |
| 7 | -23 |
| 8 | -34 |
| 9 | -47 |
| 10 | -68 |
| 11 | -84 |
| 12 | -75 |
| 13 | -117 |
| 14 | -141 |
| 15 | -166 |
| 16 | -193 |
| 17 | -227 |
| 18 | -262 |
| 19 | -308 |
| 20 | -298 |
| 21 | -296 |
| 22 | -206 |
| 23 | -164 |
| 24 | -133 |
| 25 | -107 |
| 26 | -96 |
| 27 | -66 |
| 28 | -48 |
| 29 | 10 |
| 30 | 51 |
| 31 | 71 |
| 32 | 157 |
| 33 | 200 |
| 34 | 260 |
| 35 | 305 |
| 36 | 408 |
| 37 | 456 |
| 38 | 510 |
| 39 | 615 |
| 40 | 698 |
| 41 | 650 |
| 42 | 499 |
| 43 | 344 |
| 44 | 285 |
| 45 | 198 |
| 46 | 119 |
| 47 | -27 |
| 48 | 79 |
| 49 | -78 |
| 50 | -187 |
| 51 | -405 |