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 | 1 |
| 4 | 0 |
| 5 | 2 |
| 6 | -2 |
| 7 | -15 |
| 8 | 7 |
| 9 | 17 |
| 10 | -5 |
| 11 | -7 |
| 12 | 1 |
| 13 | 1 |
| 14 | -2 |
| 15 | -6 |
| 16 | 25 |
| 17 | 71 |
| 18 | -80 |
| 19 | -218 |
| 20 | 126 |
| 21 | 284 |
| 22 | -106 |
| 23 | -190 |
| 24 | 48 |
| 25 | 69 |
| 26 | -11 |
| 27 | -13 |
| 28 | 1 |
| 29 | 1 |
| 30 | 0 |
| 31 | 6 |
| 32 | -12 |
| 33 | -137 |
| 34 | 196 |
| 35 | 945 |
| 36 | -811 |
| 37 | -2745 |
| 38 | 1602 |
| 39 | 4163 |
| 40 | -1780 |
| 41 | -3711 |
| 42 | 1193 |
| 43 | 2059 |
| 44 | -493 |
| 45 | -722 |
| 46 | 123 |
| 47 | 156 |
| 48 | -17 |
| 49 | -19 |
| 50 | 1 |
| 51 | 1 |
| 52 | -3 |
| 53 | -12 |
| 54 | 94 |
| 55 | 358 |
| 56 | -952 |
| 57 | -3430 |
| 58 | 4699 |
| 59 | 15615 |
| 60 | -13467 |
| 61 | -39946 |
| 62 | 24494 |
| 63 | 63168 |
| 64 | -29535 |
| 65 | -65638 |
| 66 | 24206 |
| 67 | 46512 |
| 68 | -13652 |
| 69 | -22891 |
| 70 | 5294 |
| 71 | 7834 |
| 72 | -1386 |
| 73 | -1831 |
| 74 | 234 |
| 75 | 279 |
| 76 | -23 |
| 77 | -25 |
| 78 | 1 |
| 79 | 1 |