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 | 6 |
| 3 | 4 |
| 4 | 25 |
| 5 | -13 |
| 6 | 37 |
| 7 | -25 |
| 8 | 49 |
| 9 | 73 |
| 10 | -98 |
| 11 | 146 |
| 12 | -49 |
| 13 | -73 |
| 14 | 97 |
| 15 | 121 |
| 16 | 36 |
| 17 | -218 |
| 18 | 266 |
| 19 | -109 |
| 20 | -133 |
| 21 | 314 |
| 22 | -133 |
| 23 | 193 |
| 24 | 229 |
| 25 | -350 |
| 26 | -193 |
| 27 | 217 |
| 28 | -205 |
| 29 | 229 |
| 30 | 1241 |
| 31 | -1169 |
| 32 | 289 |
| 33 | -530 |
| 34 | 1168 |
| 35 | -1144 |
| 36 | 626 |
| 37 | 36 |
| 38 | -301 |
| 39 | 361 |
| 40 | 36 |
| 41 | -698 |
| 42 | 1504 |
| 43 | -1480 |
| 44 | 397 |
| 45 | -385 |
| 46 | 2069 |
| 47 | 144 |
| 48 | -1708 |
| 49 | -445 |
| 50 | 469 |