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 | 1 |
| 6 | -1 |
| 7 | 4 |
| 8 | 2 |
| 9 | 3 |
| 10 | 1 |
| 11 | 8 |
| 12 | -8 |
| 13 | 10 |
| 14 | -8 |
| 15 | -9 |
| 16 | -15 |
| 17 | -6 |
| 18 | -46 |
| 19 | -14 |
| 20 | -65 |
| 21 | -28 |
| 22 | 14 |
| 23 | -29 |
| 24 | -43 |
| 25 | -37 |
| 26 | 298 |
| 27 | 59 |
| 28 | 234 |
| 29 | 165 |
| 30 | 738 |
| 31 | 354 |
| 32 | 1083 |
| 33 | 703 |
| 34 | 1944 |
| 35 | -2024 |
| 36 | 1917 |
| 37 | -1085 |
| 38 | 3658 |
| 39 | -2385 |
| 40 | -6421 |
| 41 | -7220 |
| 42 | 118 |
| 43 | -15569 |
| 44 | -11604 |
| 45 | -19162 |
| 46 | -9448 |
| 47 | -36140 |
| 48 | -24561 |
| 49 | -50505 |
| 50 | -24807 |
| 51 | 47645 |