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 | -2 |
| 4 | -1 |
| 5 | 1 |
| 6 | 6 |
| 7 | 2 |
| 8 | -3 |
| 9 | 1 |
| 10 | -22 |
| 11 | -6 |
| 12 | 10 |
| 13 | -5 |
| 14 | 1 |
| 15 | 90 |
| 16 | 22 |
| 17 | -38 |
| 18 | 22 |
| 19 | -7 |
| 20 | 1 |
| 21 | -394 |
| 22 | -90 |
| 23 | 158 |
| 24 | -98 |
| 25 | 38 |
| 26 | -9 |
| 27 | 1 |
| 28 | 1806 |
| 29 | 394 |
| 30 | -698 |
| 31 | 450 |
| 32 | -194 |
| 33 | 58 |
| 34 | -11 |
| 35 | 1 |
| 36 | -8558 |
| 37 | -1806 |
| 38 | 3218 |
| 39 | -2126 |
| 40 | 978 |
| 41 | -334 |
| 42 | 82 |
| 43 | -13 |
| 44 | 1 |
| 45 | 41586 |
| 46 | 8558 |
| 47 | -15310 |
| 48 | 10286 |
| 49 | -4942 |
| 50 | 1838 |
| 51 | -526 |
| 52 | 110 |
| 53 | -15 |
| 54 | 1 |
| 55 | -206098 |
| 56 | -41586 |
| 57 | 74614 |
| 58 | -50746 |
| 59 | 25150 |
| 60 | -9922 |
| 61 | 3142 |
| 62 | -778 |
| 63 | 142 |
| 64 | -17 |
| 65 | 1 |