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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 3 |
| 6 | 0 |
| 7 | 0 |
| 8 | -3 |
| 9 | 16 |
| 10 | 0 |
| 11 | 0 |
| 12 | 3 |
| 13 | -32 |
| 14 | 125 |
| 15 | 0 |
| 16 | 0 |
| 17 | -3 |
| 18 | 64 |
| 19 | -375 |
| 20 | 1296 |
| 21 | 0 |
| 22 | 0 |
| 23 | 3 |
| 24 | -128 |
| 25 | 1125 |
| 26 | -5184 |
| 27 | 16807 |
| 28 | 0 |
| 29 | 0 |
| 30 | -3 |
| 31 | 256 |
| 32 | -3375 |
| 33 | 20736 |
| 34 | -84035 |
| 35 | 262144 |
| 36 | 0 |
| 37 | 0 |
| 38 | 3 |
| 39 | -512 |
| 40 | 10125 |
| 41 | -82944 |
| 42 | 420175 |
| 43 | -1572864 |
| 44 | 4782969 |
| 45 | 0 |
| 46 | 0 |
| 47 | -3 |
| 48 | 1024 |
| 49 | -30375 |
| 50 | 331776 |
| 51 | -2100875 |
| 52 | 9437184 |
| 53 | -33480783 |
| 54 | 100000000 |
| 55 | 0 |
| 56 | 0 |
| 57 | 3 |
| 58 | -2048 |
| 59 | 91125 |
| 60 | -1327104 |
| 61 | 10504375 |
| 62 | -56623104 |
| 63 | 234365481 |
| 64 | -800000000 |
| 65 | 2357947691 |
| 66 | 0 |
| 67 | 0 |
| 68 | -3 |
| 69 | 4096 |
| 70 | -273375 |
| 71 | 5308416 |
| 72 | -52521875 |