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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 2 |
| 11 | 2 |
| 12 | 3 |
| 13 | 0 |
| 14 | -1 |
| 15 | -1 |
| 16 | 1 |
| 17 | 2 |
| 18 | 0 |
| 19 | -1 |
| 20 | 0 |
| 21 | 2 |
| 22 | 6 |
| 23 | 1 |
| 24 | 2 |
| 25 | 7 |
| 26 | 5 |
| 27 | -1 |
| 28 | -7 |
| 29 | -4 |
| 30 | 4 |
| 31 | -7 |
| 32 | -21 |
| 33 | -7 |
| 34 | -2 |
| 35 | 30 |
| 36 | 2 |
| 37 | 14 |
| 38 | -8 |
| 39 | 7 |
| 40 | -1 |
| 41 | -7 |
| 42 | -12 |
| 43 | -1 |
| 44 | 21 |
| 45 | 28 |
| 46 | 7 |
| 47 | -29 |
| 48 | -33 |
| 49 | -76 |
| 50 | -88 |
| 51 | 15 |
| 52 | 47 |
| 53 | 58 |
| 54 | -51 |
| 55 | -112 |
| 56 | 293 |
| 57 | 122 |
| 58 | 316 |
| 59 | -96 |
| 60 | -42 |
| 61 | -259 |
| 62 | 140 |
| 63 | -111 |
| 64 | 6 |
| 65 | -790 |
| 66 | -342 |
| 67 | 146 |
| 68 | 395 |
| 69 | 1087 |