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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | -2 |
| 6 | 1 |
| 7 | -1 |
| 8 | -2 |
| 9 | 2 |
| 10 | 1 |
| 11 | -2 |
| 12 | 0 |
| 13 | 8 |
| 14 | 8 |
| 15 | 1 |
| 16 | -3 |
| 17 | 4 |
| 18 | 8 |
| 19 | -24 |
| 20 | -88 |
| 21 | 1 |
| 22 | -4 |
| 23 | 10 |
| 24 | -4 |
| 25 | -56 |
| 26 | 32 |
| 27 | 592 |
| 28 | 1 |
| 29 | -5 |
| 30 | 18 |
| 31 | -34 |
| 32 | -40 |
| 33 | 312 |
| 34 | 400 |
| 35 | -3344 |
| 36 | 1 |
| 37 | -6 |
| 38 | 28 |
| 39 | -88 |
| 40 | 96 |
| 41 | 512 |
| 42 | -1472 |
| 43 | -6144 |
| 44 | 14464 |
| 45 | 1 |
| 46 | -7 |
| 47 | 40 |
| 48 | -172 |
| 49 | 448 |
| 50 | 32 |
| 51 | -4544 |
| 52 | 4160 |
| 53 | 63616 |
| 54 | -2944 |