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 | 1 |
| 5 | 1 |
| 6 | 0 |
| 7 | 1 |
| 8 | 4 |
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 13 |
| 13 | 10 |
| 14 | 1 |
| 15 | 0 |
| 16 | -4 |
| 17 | 30 |
| 18 | 73 |
| 19 | 20 |
| 20 | 1 |
| 21 | 0 |
| 22 | 0 |
| 23 | -14 |
| 24 | 425 |
| 25 | 273 |
| 26 | 35 |
| 27 | 1 |
| 28 | 0 |
| 29 | 120 |
| 30 | -504 |
| 31 | 1561 |
| 32 | 3008 |
| 33 | 798 |
| 34 | 56 |
| 35 | 1 |
| 36 | 0 |
| 37 | 0 |
| 38 | 736 |
| 39 | -2856 |
| 40 | 25809 |
| 41 | 14572 |
| 42 | 1974 |
| 43 | 84 |
| 44 | 1 |
| 45 | 0 |
| 46 | -12096 |
| 47 | 44640 |
| 48 | -73520 |
| 49 | 125580 |
| 50 | 218769 |
| 51 | 55060 |
| 52 | 4326 |
| 53 | 120 |
| 54 | 1 |