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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | -1 |
| 6 | -2 |
| 7 | -3 |
| 8 | -2 |
| 9 | 1 |
| 10 | 6 |
| 11 | 13 |
| 12 | 17 |
| 13 | 13 |
| 14 | -4 |
| 15 | -39 |
| 16 | -83 |
| 17 | -113 |
| 18 | -92 |
| 19 | 31 |
| 20 | 279 |
| 21 | 605 |
| 22 | 850 |
| 23 | 701 |
| 24 | -219 |
| 25 | -2129 |
| 26 | -4736 |
| 27 | -6749 |
| 28 | -5690 |
| 29 | 1569 |
| 30 | 17114 |
| 31 | 38713 |
| 32 | 55957 |
| 33 | 48249 |
| 34 | -11498 |
| 35 | -142163 |
| 36 | -326860 |
| 37 | -478957 |
| 38 | -421262 |
| 39 | 84015 |
| 40 | 1210831 |
| 41 | 2829363 |
| 42 | 4197670 |
| 43 | 3762583 |
| 44 | -601732 |