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 | -1 |
| 3 | -3 |
| 4 | -2 |
| 5 | 1 |
| 6 | 8 |
| 7 | 14 |
| 8 | 3 |
| 9 | -1 |
| 10 | -20 |
| 11 | -56 |
| 12 | -40 |
| 13 | -4 |
| 14 | 1 |
| 15 | 48 |
| 16 | 184 |
| 17 | 224 |
| 18 | 90 |
| 19 | 5 |
| 20 | -1 |
| 21 | -112 |
| 22 | -544 |
| 23 | -936 |
| 24 | -672 |
| 25 | -175 |
| 26 | -6 |
| 27 | 1 |
| 28 | 256 |
| 29 | 1504 |
| 30 | 3344 |
| 31 | 3480 |
| 32 | 1680 |
| 33 | 308 |
| 34 | 7 |
| 35 | -1 |
| 36 | -576 |
| 37 | -3968 |
| 38 | -10816 |
| 39 | -14784 |
| 40 | -10560 |
| 41 | -3696 |
| 42 | -504 |
| 43 | -8 |
| 44 | 1 |
| 45 | 1280 |
| 46 | 10112 |
| 47 | 32640 |
| 48 | 55328 |