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 | 1 |
| 2 | -3 |
| 3 | -2 |
| 4 | 9 |
| 5 | 10 |
| 6 | 6 |
| 7 | 7 |
| 8 | -27 |
| 9 | -26 |
| 10 | -30 |
| 11 | -29 |
| 12 | -18 |
| 13 | -17 |
| 14 | -21 |
| 15 | -20 |
| 16 | 81 |
| 17 | 82 |
| 18 | 78 |
| 19 | 79 |
| 20 | 90 |
| 21 | 91 |
| 22 | 87 |
| 23 | 88 |
| 24 | 54 |
| 25 | 55 |
| 26 | 51 |
| 27 | 52 |
| 28 | 63 |
| 29 | 64 |
| 30 | 60 |
| 31 | 61 |
| 32 | -243 |
| 33 | -242 |
| 34 | -246 |
| 35 | -245 |
| 36 | -234 |
| 37 | -233 |
| 38 | -237 |
| 39 | -236 |
| 40 | -270 |
| 41 | -269 |
| 42 | -273 |
| 43 | -272 |
| 44 | -261 |
| 45 | -260 |
| 46 | -264 |
| 47 | -263 |
| 48 | -162 |
| 49 | -161 |
| 50 | -165 |
| 51 | -164 |
| 52 | -153 |
| 53 | -152 |
| 54 | -156 |
| 55 | -155 |
| 56 | -189 |
| 57 | -188 |
| 58 | -192 |
| 59 | -191 |
| 60 | -180 |
| 61 | -179 |
| 62 | -183 |
| 63 | -182 |