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 | 0 |
| 2 | -1 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 1 |
| 10 | -2 |
| 11 | -3 |
| 12 | 0 |
| 13 | 4 |
| 14 | 2 |
| 15 | -3 |
| 16 | 0 |
| 17 | 4 |
| 18 | -1 |
| 19 | -10 |
| 20 | -5 |
| 21 | 12 |
| 22 | 13 |
| 23 | -6 |
| 24 | -12 |
| 25 | 7 |
| 26 | 9 |
| 27 | -20 |
| 28 | -28 |
| 29 | 23 |
| 30 | 57 |
| 31 | 1 |
| 32 | -59 |
| 33 | -18 |
| 34 | 51 |
| 35 | -5 |
| 36 | -93 |
| 37 | 1 |
| 38 | 176 |
| 39 | 93 |
| 40 | -189 |
| 41 | -188 |
| 42 | 131 |
| 43 | 183 |
| 44 | -191 |
| 45 | -220 |
| 46 | 370 |
| 47 | 525 |
| 48 | -347 |
| 49 | -902 |
| 50 | 44 |
| 51 | 973 |
| 52 | 64 |
| 53 | -1071 |
| 54 | 171 |
| 55 | 1881 |
| 56 | 156 |
| 57 | -2974 |
| 58 | -1537 |