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 | 2 |
| 4 | -3 |
| 5 | 1 |
| 6 | -5 |
| 7 | 9 |
| 8 | -5 |
| 9 | 1 |
| 10 | 12 |
| 11 | -25 |
| 12 | 19 |
| 13 | -7 |
| 14 | 1 |
| 15 | -17 |
| 16 | 48 |
| 17 | -55 |
| 18 | 32 |
| 19 | -9 |
| 20 | 1 |
| 21 | -62 |
| 22 | 60 |
| 23 | 60 |
| 24 | -96 |
| 25 | 48 |
| 26 | -11 |
| 27 | 1 |
| 28 | 677 |
| 29 | -1229 |
| 30 | 639 |
| 31 | 7 |
| 32 | -149 |
| 33 | 67 |
| 34 | -13 |
| 35 | 1 |
| 36 | -2840 |
| 37 | 6435 |
| 38 | -5565 |
| 39 | 2275 |
| 40 | -165 |
| 41 | -215 |
| 42 | 89 |
| 43 | -15 |
| 44 | 1 |
| 45 | -1451 |
| 46 | -6189 |
| 47 | 18556 |
| 48 | -15974 |
| 49 | 5778 |
| 50 | -523 |
| 51 | -295 |
| 52 | 114 |
| 53 | -17 |
| 54 | 1 |