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 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 0 |
| 9 | -1 |
| 10 | -1 |
| 11 | 2 |
| 12 | 1 |
| 13 | 0 |
| 14 | -2 |
| 15 | 0 |
| 16 | 1 |
| 17 | 3 |
| 18 | -2 |
| 19 | -1 |
| 20 | 0 |
| 21 | 4 |
| 22 | 0 |
| 23 | -1 |
| 24 | -4 |
| 25 | 6 |
| 26 | 2 |
| 27 | 2 |
| 28 | -10 |
| 29 | 4 |
| 30 | 4 |
| 31 | 13 |
| 32 | -15 |
| 33 | -7 |
| 34 | -2 |
| 35 | 30 |
| 36 | -7 |
| 37 | -7 |
| 38 | -33 |
| 39 | 42 |
| 40 | 8 |
| 41 | 16 |
| 42 | -70 |
| 43 | 27 |
| 44 | 22 |
| 45 | 95 |
| 46 | -116 |
| 47 | -21 |
| 48 | -39 |
| 49 | 223 |
| 50 | -61 |
| 51 | -48 |
| 52 | -261 |
| 53 | 326 |
| 54 | 51 |
| 55 | 129 |
| 56 | -581 |
| 57 | 242 |
| 58 | 109 |
| 59 | 752 |
| 60 | -932 |
| 61 | -105 |
| 62 | -330 |
| 63 | 1806 |
| 64 | -612 |
| 65 | -240 |
| 66 | -2140 |
| 67 | 2750 |
| 68 | 227 |
| 69 | 1245 |
| 70 | -4865 |