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 | -5 |
| 2 | 6 |
| 3 | -10 |
| 4 | 11 |
| 5 | -1 |
| 6 | 1 |
| 7 | 17 |
| 8 | -18 |
| 9 | 22 |
| 10 | -23 |
| 11 | 1 |
| 12 | -1 |
| 13 | -29 |
| 14 | 30 |
| 15 | -34 |
| 16 | 35 |
| 17 | -1 |
| 18 | 1 |
| 19 | 41 |
| 20 | -42 |
| 21 | 46 |
| 22 | -47 |
| 23 | 1 |
| 24 | -1 |
| 25 | -53 |
| 26 | 54 |
| 27 | -58 |
| 28 | 59 |
| 29 | -1 |
| 30 | 1 |
| 31 | 65 |
| 32 | -66 |
| 33 | 70 |
| 34 | -71 |
| 35 | 1 |
| 36 | -1 |
| 37 | -77 |
| 38 | 78 |
| 39 | -82 |
| 40 | 83 |
| 41 | -1 |
| 42 | 1 |
| 43 | 89 |
| 44 | -90 |
| 45 | 94 |
| 46 | -95 |
| 47 | 1 |
| 48 | -1 |
| 49 | -101 |
| 50 | 102 |
| 51 | -106 |
| 52 | 107 |
| 53 | -1 |
| 54 | 1 |
| 55 | 113 |
| 56 | -114 |
| 57 | 118 |
| 58 | -119 |