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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | -1 |
| 6 | 0 |
| 7 | 3 |
| 8 | 0 |
| 9 | 0 |
| 10 | -3 |
| 11 | 3 |
| 12 | 3 |
| 13 | 12 |
| 14 | 6 |
| 15 | -3 |
| 16 | 34 |
| 17 | -1 |
| 18 | 0 |
| 19 | 16 |
| 20 | 8 |
| 21 | 9 |
| 22 | 103 |
| 23 | 17 |
| 24 | 0 |
| 25 | 75 |
| 26 | 6 |
| 27 | 0 |
| 28 | -17 |
| 29 | -7 |
| 30 | -9 |
| 31 | 24 |
| 32 | 12 |
| 33 | 9 |
| 34 | 36 |
| 35 | 21 |
| 36 | 9 |
| 37 | 12 |
| 38 | 60 |
| 39 | 36 |
| 40 | 135 |
| 41 | 99 |
| 42 | 18 |
| 43 | 207 |
| 44 | 36 |
| 45 | -9 |
| 46 | 199 |
| 47 | 149 |
| 48 | 102 |
| 49 | 576 |
| 50 | 150 |
| 51 | -3 |
| 52 | 448 |
| 53 | 11 |
| 54 | 0 |
| 55 | 22 |
| 56 | 54 |
| 57 | 48 |
| 58 | 217 |
| 59 | 29 |
| 60 | 24 |
| 61 | 289 |
| 62 | 50 |
| 63 | 27 |
| 64 | 279 |
| 65 | 425 |
| 66 | 309 |
| 67 | 808 |
| 68 | 212 |
| 69 | 51 |
| 70 | 1180 |
| 71 | 89 |
| 72 | 0 |
| 73 | 1152 |
| 74 | 318 |
| 75 | 225 |
| 76 | 3049 |
| 77 | 323 |
| 78 | 18 |