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 | 1 |
| 4 | 2 |
| 5 | -3 |
| 6 | 1 |
| 7 | -8 |
| 8 | 13 |
| 9 | -6 |
| 10 | 1 |
| 11 | 56 |
| 12 | -92 |
| 13 | 45 |
| 14 | -10 |
| 15 | 1 |
| 16 | -608 |
| 17 | 1000 |
| 18 | -493 |
| 19 | 115 |
| 20 | -15 |
| 21 | 1 |
| 22 | 9440 |
| 23 | -15528 |
| 24 | 7662 |
| 25 | -1799 |
| 26 | 245 |
| 27 | -21 |
| 28 | 1 |
| 29 | -198272 |
| 30 | 326144 |
| 31 | -160944 |
| 32 | 37817 |
| 33 | -5180 |
| 34 | 462 |
| 35 | -28 |
| 36 | 1 |
| 37 | 5410688 |
| 38 | -8900224 |
| 39 | 4392080 |
| 40 | -1032088 |
| 41 | 141465 |
| 42 | -12684 |
| 43 | 798 |
| 44 | -36 |
| 45 | 1 |