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 | 4 |
| 4 | 1 |
| 5 | -6 |
| 6 | -11 |
| 7 | -6 |
| 8 | 9 |
| 9 | 21 |
| 10 | 14 |
| 11 | -12 |
| 12 | -34 |
| 13 | -25 |
| 14 | 15 |
| 15 | 50 |
| 16 | 39 |
| 17 | -18 |
| 18 | -69 |
| 19 | -56 |
| 20 | 21 |
| 21 | 91 |
| 22 | 76 |
| 23 | -24 |
| 24 | -116 |
| 25 | -99 |
| 26 | 27 |
| 27 | 144 |
| 28 | 125 |
| 29 | -30 |
| 30 | -175 |
| 31 | -154 |
| 32 | 33 |
| 33 | 209 |
| 34 | 186 |
| 35 | -36 |
| 36 | -246 |
| 37 | -221 |
| 38 | 39 |
| 39 | 286 |
| 40 | 259 |
| 41 | -42 |
| 42 | -329 |
| 43 | -300 |
| 44 | 45 |
| 45 | 375 |