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 | 1 |
| 2 | -2 |
| 3 | -4 |
| 4 | -3 |
| 5 | 4 |
| 6 | 12 |
| 7 | 8 |
| 8 | -10 |
| 9 | -28 |
| 10 | -18 |
| 11 | 24 |
| 12 | 60 |
| 13 | 38 |
| 14 | -48 |
| 15 | -120 |
| 16 | -75 |
| 17 | 92 |
| 18 | 228 |
| 19 | 140 |
| 20 | -172 |
| 21 | -416 |
| 22 | -252 |
| 23 | 304 |
| 24 | 732 |
| 25 | 439 |
| 26 | -524 |
| 27 | -1252 |
| 28 | -744 |
| 29 | 884 |
| 30 | 2088 |
| 31 | 1232 |
| 32 | -1450 |
| 33 | -3408 |
| 34 | -1998 |
| 35 | 2336 |
| 36 | 5460 |
| 37 | 3182 |
| 38 | -3704 |
| 39 | -8600 |
| 40 | -4986 |
| 41 | 5772 |
| 42 | 13344 |
| 43 | 7700 |
| 44 | -8872 |
| 45 | -20424 |
| 46 | -11736 |