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 | 1 |
| 2 | -3 |
| 3 | -12 |
| 4 | -12 |
| 5 | -37 |
| 6 | -1 |
| 7 | -50 |
| 8 | -50 |
| 9 | -50 |
| 10 | 50 |
| 11 | -71 |
| 12 | -71 |
| 13 | -240 |
| 14 | -44 |
| 15 | 181 |
| 16 | 181 |
| 17 | -108 |
| 18 | -108 |
| 19 | -469 |
| 20 | -469 |
| 21 | -28 |
| 22 | 456 |
| 23 | -73 |
| 24 | -73 |
| 25 | -73 |
| 26 | 603 |
| 27 | 603 |
| 28 | 603 |
| 29 | -238 |
| 30 | -1138 |
| 31 | -2099 |
| 32 | -2099 |
| 33 | -1010 |
| 34 | 146 |
| 35 | 1371 |
| 36 | 1371 |
| 37 | 2 |
| 38 | 1446 |
| 39 | 2967 |
| 40 | 2967 |
| 41 | 1286 |
| 42 | -478 |
| 43 | -2327 |
| 44 | -2327 |
| 45 | -2327 |
| 46 | -211 |
| 47 | -2420 |