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 | -1 |
| 5 | 1 |
| 6 | -1 |
| 7 | 11 |
| 8 | -3 |
| 9 | 1 |
| 10 | 1 |
| 11 | -5 |
| 12 | 7 |
| 13 | -2 |
| 14 | 1 |
| 15 | -1 |
| 16 | 137 |
| 17 | -15 |
| 18 | 17 |
| 19 | -5 |
| 20 | 1 |
| 21 | 1 |
| 22 | -7 |
| 23 | 29 |
| 24 | -7 |
| 25 | 25 |
| 26 | -3 |
| 27 | 1 |
| 28 | -1 |
| 29 | 363 |
| 30 | -469 |
| 31 | 967 |
| 32 | -35 |
| 33 | 23 |
| 34 | -7 |
| 35 | 1 |
| 36 | 1 |
| 37 | -761 |
| 38 | 29531 |
| 39 | -89 |
| 40 | 1069 |
| 41 | -9 |
| 42 | 91 |
| 43 | -4 |
| 44 | 1 |
| 45 | -1 |
| 46 | 7129 |
| 47 | -1303 |
| 48 | 4523 |
| 49 | -285 |
| 50 | 3013 |
| 51 | -105 |
| 52 | 29 |
| 53 | -9 |
| 54 | 1 |
| 55 | 1 |
| 56 | -671 |
| 57 | 16103 |
| 58 | -7645 |
| 59 | 31063 |
| 60 | -781 |
| 61 | 4781 |
| 62 | -55 |
| 63 | 12 |
| 64 | -5 |
| 65 | 1 |