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 | 0 |
| 3 | -1 |
| 4 | 1 |
| 5 | 1 |
| 6 | -1 |
| 7 | -2 |
| 8 | 1 |
| 9 | 4 |
| 10 | -2 |
| 11 | -5 |
| 12 | 3 |
| 13 | 6 |
| 14 | -4 |
| 15 | -9 |
| 16 | 6 |
| 17 | 13 |
| 18 | -8 |
| 19 | -17 |
| 20 | 11 |
| 21 | 21 |
| 22 | -15 |
| 23 | -28 |
| 24 | 19 |
| 25 | 39 |
| 26 | -25 |
| 27 | -49 |
| 28 | 33 |
| 29 | 60 |
| 30 | -42 |
| 31 | -78 |
| 32 | 53 |
| 33 | 101 |
| 34 | -68 |
| 35 | -125 |
| 36 | 87 |
| 37 | 153 |
| 38 | -108 |
| 39 | -192 |
| 40 | 134 |
| 41 | 241 |
| 42 | -167 |
| 43 | -295 |
| 44 | 207 |
| 45 | 357 |
| 46 | -255 |
| 47 | -438 |
| 48 | 311 |
| 49 | 540 |
| 50 | -380 |
| 51 | -652 |
| 52 | 465 |
| 53 | 781 |
| 54 | -563 |
| 55 | -946 |
| 56 | 678 |
| 57 | 1145 |
| 58 | -819 |
| 59 | -1368 |
| 60 | 986 |
| 61 | 1627 |