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) |
|---|---|
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | 0 |
| 6 | 5 |
| 7 | 0 |
| 8 | 20 |
| 9 | -24 |
| 10 | 35 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 84 |
| 15 | -160 |
| 16 | 200 |
| 17 | 0 |
| 18 | -150 |
| 19 | 0 |
| 20 | 460 |
| 21 | -560 |
| 22 | 286 |
| 23 | 0 |
| 24 | 140 |
| 25 | -200 |
| 26 | 455 |
| 27 | -1440 |
| 28 | 2100 |
| 29 | 0 |
| 30 | -2180 |
| 31 | 0 |
| 32 | 3840 |
| 33 | -3080 |
| 34 | 969 |
| 35 | -2240 |
| 36 | 2730 |
| 37 | 0 |
| 38 | 1330 |
| 39 | -5824 |
| 40 | 5320 |
| 41 | 0 |
| 42 | -4235 |
| 43 | 0 |
| 44 | 16874 |
| 45 | -21840 |
| 46 | 2300 |
| 47 | 0 |
| 48 | 18440 |
| 49 | -784 |
| 50 | -20175 |
| 51 | -16320 |
| 52 | 37310 |
| 53 | 0 |
| 54 | -945 |
| 55 | -42240 |
| 56 | 49560 |
| 57 | -25080 |
| 58 | 4495 |
| 59 | 0 |
| 60 | 7560 |
| 61 | 0 |
| 62 | 5456 |
| 63 | -50400 |
| 64 | 102528 |
| 65 | -120120 |
| 66 | 40810 |
| 67 | 0 |
| 68 | 135660 |
| 69 | -52624 |
| 70 | -221690 |
| 71 | 0 |
| 72 | 278256 |
| 73 | 0 |
| 74 | 9139 |
| 75 | -364000 |
| 76 | 232750 |
| 77 | -99792 |
| 78 | 211120 |
| 79 | 0 |
| 80 | -106680 |
| 81 | -100440 |
| 82 | 12341 |
| 83 | 0 |
| 84 | 537992 |
| 85 | -628320 |
| 86 | 14190 |
| 87 | -129920 |
| 88 | 563420 |
| 89 | 0 |
| 90 | -195015 |
| 91 | -480480 |
| 92 | 591100 |
| 93 | -168640 |
| 94 | 18424 |
| 95 | -1240320 |
| 96 | 2138640 |
| 97 | 0 |
| 98 | -925120 |
| 99 | -268224 |
| 100 | -803250 |
| 101 | 0 |