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 | 3 |
| 5 | 7 |
| 6 | -3 |
| 7 | 11 |
| 8 | 5 |
| 9 | -1 |
| 10 | -3 |
| 11 | 1 |
| 12 | 71 |
| 13 | 7 |
| 14 | 23 |
| 15 | -9 |
| 16 | 21 |
| 17 | 13 |
| 18 | 93 |
| 19 | -11 |
| 20 | -73 |
| 21 | -9 |
| 22 | 5 |
| 23 | 85 |
| 24 | -19 |
| 25 | 645 |
| 26 | -65 |
| 27 | -49 |
| 28 | -15 |
| 29 | 49 |
| 30 | -1 |
| 31 | 189 |
| 32 | 5 |
| 33 | -465 |
| 34 | -119 |
| 35 | -217 |
| 36 | -15 |
| 37 | 39 |
| 38 | 463 |
| 39 | -11 |
| 40 | 495 |
| 41 | -127 |
| 42 | 519 |
| 43 | -209 |
| 44 | -193 |
| 45 | -17 |
| 46 | 23 |
| 47 | 95 |
| 48 | 1151 |
| 49 | -29 |
| 50 | -273 |
| 51 | -103 |
| 52 | -2967 |
| 53 | -207 |
| 54 | -217 |
| 55 | -27 |
| 56 | -5 |
| 57 | 149 |
| 58 | 357 |
| 59 | 9839 |
| 60 | -119 |
| 61 | -255 |
| 62 | -231 |
| 63 | -1551 |
| 64 | -435 |
| 65 | -721 |
| 66 | -25 |