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 | 2 |
| 2 | -4 |
| 3 | 6 |
| 4 | 8 |
| 5 | -22 |
| 6 | 26 |
| 7 | -8 |
| 8 | 64 |
| 9 | -114 |
| 10 | 78 |
| 11 | 12 |
| 12 | -148 |
| 13 | 402 |
| 14 | -478 |
| 15 | 242 |
| 16 | -16 |
| 17 | 314 |
| 18 | -1192 |
| 19 | 2070 |
| 20 | -1866 |
| 21 | 726 |
| 22 | 16 |
| 23 | -614 |
| 24 | 3110 |
| 25 | -7334 |
| 26 | 9578 |
| 27 | -6886 |
| 28 | 2186 |
| 29 | -16 |
| 30 | 1136 |
| 31 | -7408 |
| 32 | 22680 |
| 33 | -39394 |
| 34 | 41118 |
| 35 | -24546 |
| 36 | 6558 |
| 37 | 26 |
| 38 | -2008 |
| 39 | 16694 |
| 40 | -63526 |
| 41 | 139730 |
| 42 | -192622 |
| 43 | 167426 |
| 44 | -85294 |
| 45 | 19682 |
| 46 | -24 |
| 47 | 3436 |
| 48 | -35644 |
| 49 | 165176 |
| 50 | -444824 |
| 51 | 768966 |
| 52 | -880314 |
| 53 | 655206 |
| 54 | -290874 |
| 55 | 59046 |
| 56 | 24 |
| 57 | -5718 |
| 58 | 72910 |
| 59 | -404402 |
| 60 | 1303018 |
| 61 | -2731958 |
| 62 | 3902538 |
| 63 | -3822454 |
| 64 | 2486618 |
| 65 | -977590 |
| 66 | 177146 |
| 67 | -32 |
| 68 | 9292 |
| 69 | -144086 |
| 70 | 942646 |
| 71 | -3571352 |
| 72 | 8871544 |
| 73 | -15280722 |
| 74 | 18624942 |
| 75 | -15945042 |
| 76 | 9209454 |
| 77 | -3247698 |
| 78 | 531438 |
| 79 | 28 |
| 80 | -14766 |
| 81 | 276070 |
| 82 | -2108286 |
| 83 | 9267104 |
| 84 | -26804126 |
| 85 | 54364754 |
| 86 | -79614078 |
| 87 | 84689282 |
| 88 | -64399294 |
| 89 | 33437042 |
| 90 | -10687870 |
| 91 | 1594322 |