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 | 2 |
| 2 | -1 |
| 3 | 4 |
| 4 | -4 |
| 5 | 1 |
| 6 | 4 |
| 7 | -10 |
| 8 | 6 |
| 9 | -1 |
| 10 | 4 |
| 11 | -20 |
| 12 | 21 |
| 13 | -8 |
| 14 | 1 |
| 15 | 4 |
| 16 | -34 |
| 17 | 56 |
| 18 | -36 |
| 19 | 10 |
| 20 | -1 |
| 21 | 4 |
| 22 | -52 |
| 23 | 125 |
| 24 | -120 |
| 25 | 55 |
| 26 | -12 |
| 27 | 1 |
| 28 | 4 |
| 29 | -74 |
| 30 | 246 |
| 31 | -329 |
| 32 | 220 |
| 33 | -78 |
| 34 | 14 |
| 35 | -1 |
| 36 | 4 |
| 37 | -100 |
| 38 | 441 |
| 39 | -784 |
| 40 | 714 |
| 41 | -364 |
| 42 | 105 |
| 43 | -16 |
| 44 | 1 |
| 45 | 4 |
| 46 | -130 |
| 47 | 736 |
| 48 | -1680 |
| 49 | 1992 |
| 50 | -1364 |
| 51 | 560 |
| 52 | -136 |
| 53 | 18 |
| 54 | -1 |
| 55 | 4 |
| 56 | -164 |
| 57 | 1161 |
| 58 | -3312 |
| 59 | 4950 |
| 60 | -4356 |
| 61 | 2379 |
| 62 | -816 |
| 63 | 171 |
| 64 | -20 |
| 65 | 1 |