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) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 0 |
| 4 | -5 |
| 5 | 1 |
| 6 | -1 |
| 7 | -1 |
| 8 | 12 |
| 9 | -1 |
| 10 | -2 |
| 11 | 7 |
| 12 | 5 |
| 13 | -22 |
| 14 | 1 |
| 15 | -3 |
| 16 | 19 |
| 17 | -28 |
| 18 | -15 |
| 19 | 35 |
| 20 | -1 |
| 21 | -4 |
| 22 | 35 |
| 23 | -99 |
| 24 | 84 |
| 25 | 35 |
| 26 | -51 |
| 27 | 1 |
| 28 | -5 |
| 29 | 55 |
| 30 | -220 |
| 31 | 375 |
| 32 | -210 |
| 33 | -70 |
| 34 | 70 |
| 35 | -1 |
| 36 | -6 |
| 37 | 79 |
| 38 | -403 |
| 39 | 990 |
| 40 | -1155 |
| 41 | 462 |
| 42 | 126 |
| 43 | -92 |
| 44 | 1 |
| 45 | -7 |
| 46 | 107 |
| 47 | -660 |
| 48 | 2093 |
| 49 | -3575 |
| 50 | 3069 |
| 51 | -924 |
| 52 | -210 |
| 53 | 117 |
| 54 | -1 |