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 | 0 |
| 4 | -2 |
| 5 | 1 |
| 6 | 0 |
| 7 | 1 |
| 8 | -5 |
| 9 | 1 |
| 10 | 0 |
| 11 | 1 |
| 12 | 8 |
| 13 | -9 |
| 14 | 1 |
| 15 | 0 |
| 16 | 2 |
| 17 | 4 |
| 18 | 29 |
| 19 | -14 |
| 20 | 1 |
| 21 | 0 |
| 22 | 6 |
| 23 | 4 |
| 24 | -10 |
| 25 | 75 |
| 26 | -20 |
| 27 | 1 |
| 28 | 0 |
| 29 | 24 |
| 30 | 4 |
| 31 | -41 |
| 32 | -115 |
| 33 | 160 |
| 34 | -27 |
| 35 | 1 |
| 36 | 0 |
| 37 | 120 |
| 38 | -8 |
| 39 | -147 |
| 40 | -196 |
| 41 | -490 |
| 42 | 301 |
| 43 | -35 |
| 44 | 1 |
| 45 | 0 |
| 46 | 720 |
| 47 | -136 |
| 48 | -624 |
| 49 | -392 |
| 50 | -231 |
| 51 | -1484 |
| 52 | 518 |
| 53 | -44 |
| 54 | 1 |