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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | -1 |
| 7 | 0 |
| 8 | -1 |
| 9 | -1 |
| 10 | -2 |
| 11 | -2 |
| 12 | -1 |
| 13 | -2 |
| 14 | 0 |
| 15 | -2 |
| 16 | 2 |
| 17 | 0 |
| 18 | 1 |
| 19 | 2 |
| 20 | 1 |
| 21 | 4 |
| 22 | -1 |
| 23 | 3 |
| 24 | -4 |
| 25 | -1 |
| 26 | -5 |
| 27 | -5 |
| 28 | -4 |
| 29 | -8 |
| 30 | -1 |
| 31 | -8 |
| 32 | 4 |
| 33 | -4 |
| 34 | 7 |
| 35 | 4 |
| 36 | 7 |
| 37 | 11 |
| 38 | 3 |
| 39 | 14 |
| 40 | -5 |
| 41 | 10 |
| 42 | -11 |
| 43 | -1 |
| 44 | -15 |
| 45 | -16 |
| 46 | -11 |
| 47 | -26 |
| 48 | 0 |
| 49 | -25 |
| 50 | 15 |
| 51 | -10 |
| 52 | 25 |
| 53 | 15 |
| 54 | 24 |
| 55 | 40 |
| 56 | 9 |
| 57 | 49 |
| 58 | -16 |
| 59 | 33 |
| 60 | -41 |
| 61 | -7 |
| 62 | -50 |
| 63 | -57 |
| 64 | -34 |
| 65 | -90 |
| 66 | 6 |
| 67 | -83 |
| 68 | 56 |
| 69 | -27 |
| 70 | 89 |
| 71 | 62 |
| 72 | 82 |
| 73 | 145 |
| 74 | 26 |
| 75 | 171 |
| 76 | -63 |
| 77 | 108 |
| 78 | -146 |
| 79 | -37 |
| 80 | -172 |
| 81 | -209 |
| 82 | -109 |
| 83 | -316 |