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 | -2 |
| 2 | -1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 6 |
| 6 | -3 |
| 7 | 12 |
| 8 | -13 |
| 9 | -2 |
| 10 | -15 |
| 11 | 2 |
| 12 | -65 |
| 13 | 44 |
| 14 | 37 |
| 15 | -90 |
| 16 | 134 |
| 17 | 26 |
| 18 | 334 |
| 19 | -270 |
| 20 | 66 |
| 21 | 18 |
| 22 | 774 |
| 23 | -1280 |
| 24 | -15 |
| 25 | -2266 |
| 26 | 2627 |
| 27 | -352 |
| 28 | -3575 |
| 29 | -516 |
| 30 | -484 |
| 31 | 5660 |
| 32 | -3629 |
| 33 | 21408 |
| 34 | -20639 |
| 35 | -1228 |
| 36 | 15595 |
| 37 | 31796 |
| 38 | -22214 |
| 39 | 55390 |
| 40 | -104447 |
| 41 | 58958 |
| 42 | -160254 |
| 43 | 180704 |
| 44 | 17402 |
| 45 | -103200 |