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 | 3 |
| 6 | 4 |
| 7 | -1 |
| 8 | -6 |
| 9 | -5 |
| 10 | 1 |
| 11 | 10 |
| 12 | 11 |
| 13 | -4 |
| 14 | -19 |
| 15 | -17 |
| 16 | 4 |
| 17 | 31 |
| 18 | 31 |
| 19 | -9 |
| 20 | -50 |
| 21 | -46 |
| 22 | 11 |
| 23 | 79 |
| 24 | 77 |
| 25 | -21 |
| 26 | -122 |
| 27 | -112 |
| 28 | 28 |
| 29 | 183 |
| 30 | 173 |
| 31 | -46 |
| 32 | -273 |
| 33 | -249 |
| 34 | 62 |
| 35 | 396 |
| 36 | 370 |
| 37 | -98 |
| 38 | -573 |
| 39 | -521 |
| 40 | 130 |
| 41 | 815 |
| 42 | 751 |
| 43 | -193 |
| 44 | -1149 |
| 45 | -1041 |
| 46 | 261 |
| 47 | 1599 |
| 48 | 1461 |
| 49 | -373 |
| 50 | -2214 |
| 51 | -1998 |
| 52 | 498 |
| 53 | 3031 |