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 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | -1 |
| 6 | 1 |
| 7 | 1 |
| 8 | -3 |
| 9 | 5 |
| 10 | -2 |
| 11 | 1 |
| 12 | -6 |
| 13 | 17 |
| 14 | -20 |
| 15 | 9 |
| 16 | 1 |
| 17 | -10 |
| 18 | 45 |
| 19 | -100 |
| 20 | 109 |
| 21 | -44 |
| 22 | 1 |
| 23 | -15 |
| 24 | 100 |
| 25 | -355 |
| 26 | 694 |
| 27 | -689 |
| 28 | 265 |
| 29 | 1 |
| 30 | -21 |
| 31 | 196 |
| 32 | -1015 |
| 33 | 3094 |
| 34 | -5453 |
| 35 | 5053 |
| 36 | -1854 |
| 37 | 1 |
| 38 | -28 |
| 39 | 350 |
| 40 | -2492 |
| 41 | 10899 |
| 42 | -29596 |
| 43 | 48082 |
| 44 | -42048 |
| 45 | 14833 |