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 | 0 |
| 2 | 1 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | -5 |
| 8 | 0 |
| 9 | 1 |
| 10 | 5 |
| 11 | 0 |
| 12 | -14 |
| 13 | 0 |
| 14 | 1 |
| 15 | 0 |
| 16 | 61 |
| 17 | 0 |
| 18 | -30 |
| 19 | 0 |
| 20 | 1 |
| 21 | -61 |
| 22 | 0 |
| 23 | 331 |
| 24 | 0 |
| 25 | -55 |
| 26 | 0 |
| 27 | 1 |
| 28 | 0 |
| 29 | -1385 |
| 30 | 0 |
| 31 | 1211 |
| 32 | 0 |
| 33 | -91 |
| 34 | 0 |
| 35 | 1 |
| 36 | 1385 |
| 37 | 0 |
| 38 | -12284 |
| 39 | 0 |
| 40 | 3486 |
| 41 | 0 |
| 42 | -140 |
| 43 | 0 |
| 44 | 1 |
| 45 | 0 |
| 46 | 50521 |
| 47 | 0 |
| 48 | -68060 |
| 49 | 0 |
| 50 | 8526 |
| 51 | 0 |
| 52 | -204 |
| 53 | 0 |
| 54 | 1 |
| 55 | -50521 |
| 56 | 0 |
| 57 | 663061 |