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 | 1 |
| 2 | -2 |
| 3 | 2 |
| 4 | -4 |
| 5 | 2 |
| 6 | -10 |
| 7 | -2 |
| 8 | -14 |
| 9 | -2 |
| 10 | -20 |
| 11 | -8 |
| 12 | -32 |
| 13 | -18 |
| 14 | -42 |
| 15 | -18 |
| 16 | -42 |
| 17 | -24 |
| 18 | -60 |
| 19 | -40 |
| 20 | -76 |
| 21 | -44 |
| 22 | -80 |
| 23 | -56 |
| 24 | -104 |
| 25 | -74 |
| 26 | -116 |
| 27 | -80 |
| 28 | -128 |
| 29 | -98 |
| 30 | -170 |
| 31 | -138 |
| 32 | -186 |
| 33 | -138 |
| 34 | -192 |
| 35 | -144 |
| 36 | -216 |
| 37 | -178 |
| 38 | -238 |
| 39 | -182 |
| 40 | -254 |
| 41 | -212 |
| 42 | -308 |
| 43 | -264 |
| 44 | -336 |
| 45 | -264 |
| 46 | -336 |
| 47 | -288 |
| 48 | -384 |
| 49 | -328 |
| 50 | -418 |