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 | -6 |
| 2 | 6 |
| 3 | 22 |
| 4 | -30 |
| 5 | -30 |
| 6 | -26 |
| 7 | 102 |
| 8 | 138 |
| 9 | -94 |
| 10 | 6 |
| 11 | -450 |
| 12 | -214 |
| 13 | 258 |
| 14 | 462 |
| 15 | 846 |
| 16 | 234 |
| 17 | 618 |
| 18 | -1490 |
| 19 | -2274 |
| 20 | -2382 |
| 21 | 554 |
| 22 | -402 |
| 23 | 2070 |
| 24 | 8178 |
| 25 | 3018 |
| 26 | 7638 |
| 27 | -3226 |
| 28 | -4878 |
| 29 | -15246 |
| 30 | -14954 |
| 31 | -10506 |
| 32 | -13158 |
| 33 | -6510 |
| 34 | 22710 |
| 35 | 46830 |
| 36 | 29754 |
| 37 | 64434 |
| 38 | 12702 |
| 39 | 25278 |
| 40 | -29862 |
| 41 | -63654 |
| 42 | -130562 |
| 43 | -107922 |
| 44 | -144990 |
| 45 | -131526 |
| 46 | -15810 |
| 47 | 58278 |
| 48 | 284162 |
| 49 | 180378 |
| 50 | 460422 |
| 51 | 309686 |
| 52 | 388866 |
| 53 | 234018 |
| 54 | 159046 |
| 55 | -568986 |
| 56 | -636246 |
| 57 | -736254 |
| 58 | -1241082 |
| 59 | -1307106 |
| 60 | -971222 |