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 | 4 |
| 3 | -4 |
| 4 | 4 |
| 5 | -3 |
| 6 | -1 |
| 7 | 8 |
| 8 | -16 |
| 9 | 24 |
| 10 | -30 |
| 11 | 28 |
| 12 | -12 |
| 13 | -20 |
| 14 | 68 |
| 15 | -128 |
| 16 | 184 |
| 17 | -208 |
| 18 | 168 |
| 19 | -32 |
| 20 | -224 |
| 21 | 592 |
| 22 | -1008 |
| 23 | 1344 |
| 24 | -1408 |
| 25 | 960 |
| 26 | 224 |
| 27 | -2240 |
| 28 | 4928 |
| 29 | -7744 |
| 30 | 9664 |
| 31 | -9216 |
| 32 | 4736 |
| 33 | 5120 |
| 34 | -20608 |
| 35 | 39936 |
| 36 | -58368 |
| 37 | 67840 |
| 38 | -57600 |
| 39 | 16384 |
| 40 | 63488 |
| 41 | -180224 |
| 42 | 315904 |
| 43 | -431104 |
| 44 | 463872 |