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 | -3 |
| 2 | -3 |
| 3 | 6 |
| 4 | 6 |
| 5 | 15 |
| 6 | -12 |
| 7 | -3 |
| 8 | -30 |
| 9 | -48 |
| 10 | 6 |
| 11 | -12 |
| 12 | 15 |
| 13 | 78 |
| 14 | 186 |
| 15 | -21 |
| 16 | 168 |
| 17 | 42 |
| 18 | 42 |
| 19 | -246 |
| 20 | -408 |
| 21 | -156 |
| 22 | -399 |
| 23 | -552 |
| 24 | -498 |
| 25 | -246 |
| 26 | 213 |
| 27 | 1248 |
| 28 | -318 |
| 29 | 1608 |
| 30 | 1392 |
| 31 | 2508 |
| 32 | 1482 |
| 33 | 2976 |
| 34 | -480 |
| 35 | -1011 |
| 36 | 1500 |
| 37 | -1704 |
| 38 | -4296 |
| 39 | -4206 |
| 40 | -8499 |
| 41 | -8652 |
| 42 | -7626 |
| 43 | -7050 |
| 44 | -192 |
| 45 | -13008 |
| 46 | -480 |
| 47 | -2118 |