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 | -1 |
| 3 | 1 |
| 4 | 1 |
| 5 | -2 |
| 6 | 1 |
| 7 | 0 |
| 8 | 2 |
| 9 | -3 |
| 10 | 1 |
| 11 | -3 |
| 12 | 2 |
| 13 | 4 |
| 14 | -4 |
| 15 | 1 |
| 16 | 4 |
| 17 | -13 |
| 18 | 9 |
| 19 | 4 |
| 20 | -5 |
| 21 | 1 |
| 22 | 25 |
| 23 | -2 |
| 24 | -53 |
| 25 | 30 |
| 26 | 5 |
| 27 | -6 |
| 28 | 1 |
| 29 | -98 |
| 30 | 222 |
| 31 | -85 |
| 32 | -104 |
| 33 | 69 |
| 34 | 2 |
| 35 | -7 |
| 36 | 1 |
| 37 | -543 |
| 38 | -192 |
| 39 | 1462 |
| 40 | -644 |
| 41 | -212 |
| 42 | 136 |
| 43 | 0 |
| 44 | -8 |
| 45 | 1 |
| 46 | 4310 |
| 47 | -8809 |
| 48 | 2469 |
| 49 | 4541 |
| 50 | -2573 |
| 51 | -164 |
| 52 | 242 |
| 53 | -8 |
| 54 | -9 |
| 55 | 1 |
| 56 | 26980 |
| 57 | 17664 |
| 58 | -83744 |
| 59 | 32573 |