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 | 3 |
| 2 | 4 |
| 3 | 1 |
| 4 | -4 |
| 5 | -3 |
| 6 | 8 |
| 7 | 17 |
| 8 | 4 |
| 9 | -27 |
| 10 | -32 |
| 11 | 25 |
| 12 | 92 |
| 13 | 45 |
| 14 | -136 |
| 15 | -223 |
| 16 | 52 |
| 17 | 501 |
| 18 | 400 |
| 19 | -599 |
| 20 | -1396 |
| 21 | -195 |
| 22 | 2600 |
| 23 | 2993 |
| 24 | -2204 |
| 25 | -8187 |
| 26 | -3776 |
| 27 | 12601 |
| 28 | 20156 |
| 29 | -5043 |
| 30 | -45352 |
| 31 | -35263 |
| 32 | 55444 |
| 33 | 125973 |
| 34 | 15088 |
| 35 | -236855 |
| 36 | -267028 |
| 37 | 206685 |
| 38 | 740744 |
| 39 | 327377 |
| 40 | -1154108 |
| 41 | -1808859 |
| 42 | 499360 |
| 43 | 4117081 |
| 44 | 3118364 |
| 45 | -5115795 |
| 46 | -11352520 |