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 | 6 |
| 8 | -15 |
| 9 | 20 |
| 10 | -15 |
| 11 | 6 |
| 12 | -1 |
| 13 | 5 |
| 14 | -9 |
| 15 | 5 |
| 16 | 5 |
| 17 | -9 |
| 18 | 5 |
| 19 | -1 |
| 20 | 4 |
| 21 | -3 |
| 22 | -10 |
| 23 | 25 |
| 24 | -24 |
| 25 | 11 |
| 26 | -2 |
| 27 | 3 |
| 28 | 3 |
| 29 | -25 |
| 30 | 45 |
| 31 | -39 |
| 32 | 17 |
| 33 | -3 |
| 34 | 2 |
| 35 | 9 |
| 36 | -40 |
| 37 | 65 |
| 38 | -54 |
| 39 | 23 |
| 40 | -4 |
| 41 | 1 |
| 42 | 15 |
| 43 | -55 |
| 44 | 85 |
| 45 | -69 |
| 46 | 29 |
| 47 | -5 |
| 48 | 21 |
| 49 | -70 |
| 50 | 105 |
| 51 | -84 |
| 52 | 35 |
| 53 | -6 |
| 54 | 15 |
| 55 | -19 |
| 56 | -95 |
| 57 | 396 |
| 58 | -751 |
| 59 | 917 |
| 60 | -792 |
| 61 | 495 |
| 62 | -220 |