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 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | 1 |
| 7 | -3 |
| 8 | 3 |
| 9 | -1 |
| 10 | 1 |
| 11 | -5 |
| 12 | 8 |
| 13 | -5 |
| 14 | 1 |
| 15 | 1 |
| 16 | -7 |
| 17 | 17 |
| 18 | -17 |
| 19 | 7 |
| 20 | -1 |
| 21 | 1 |
| 22 | -9 |
| 23 | 30 |
| 24 | -45 |
| 25 | 30 |
| 26 | -9 |
| 27 | 1 |
| 28 | 1 |
| 29 | -11 |
| 30 | 47 |
| 31 | -98 |
| 32 | 103 |
| 33 | -52 |
| 34 | 12 |
| 35 | -1 |
| 36 | 1 |
| 37 | -13 |
| 38 | 68 |
| 39 | -183 |
| 40 | 269 |
| 41 | -212 |
| 42 | 83 |
| 43 | -15 |
| 44 | 1 |
| 45 | 1 |
| 46 | -15 |
| 47 | 93 |
| 48 | -308 |
| 49 | 588 |
| 50 | -651 |
| 51 | 399 |
| 52 | -123 |
| 53 | 18 |
| 54 | -1 |
| 55 | 1 |
| 56 | -17 |
| 57 | 122 |
| 58 | -481 |
| 59 | 1136 |