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 | -5 |
| 5 | 1 |
| 6 | 21 |
| 7 | -5 |
| 8 | -8 |
| 9 | 1 |
| 10 | 130 |
| 11 | 20 |
| 12 | -32 |
| 13 | -11 |
| 14 | 1 |
| 15 | 1106 |
| 16 | 840 |
| 17 | -260 |
| 18 | -77 |
| 19 | -14 |
| 20 | 1 |
| 21 | 10044 |
| 22 | 24865 |
| 23 | -2584 |
| 24 | -1089 |
| 25 | -140 |
| 26 | -17 |
| 27 | 1 |
| 28 | -18366 |
| 29 | 823383 |
| 30 | -12828 |
| 31 | -21428 |
| 32 | -2737 |
| 33 | -221 |
| 34 | -20 |
| 35 | 1 |
| 36 | -9321125 |
| 37 | 31847653 |
| 38 | 1160956 |
| 39 | -523831 |
| 40 | -73458 |
| 41 | -5474 |
| 42 | -320 |
| 43 | -23 |
| 44 | 1 |