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 | 0 |
| 4 | 3 |
| 5 | 2 |
| 6 | -3 |
| 7 | -1 |
| 8 | 8 |
| 9 | 5 |
| 10 | -8 |
| 11 | -3 |
| 12 | 18 |
| 13 | 11 |
| 14 | -19 |
| 15 | -7 |
| 16 | 38 |
| 17 | 22 |
| 18 | -41 |
| 19 | -16 |
| 20 | 75 |
| 21 | 42 |
| 22 | -82 |
| 23 | -33 |
| 24 | 142 |
| 25 | 78 |
| 26 | -157 |
| 27 | -64 |
| 28 | 258 |
| 29 | 138 |
| 30 | -288 |
| 31 | -120 |
| 32 | 455 |
| 33 | 239 |
| 34 | -511 |
| 35 | -215 |
| 36 | 781 |
| 37 | 404 |
| 38 | -882 |
| 39 | -374 |
| 40 | 1310 |
| 41 | 668 |
| 42 | -1486 |
| 43 | -635 |
| 44 | 2153 |
| 45 | 1084 |
| 46 | -2450 |
| 47 | -1053 |
| 48 | 3477 |
| 49 | 1733 |
| 50 | -3967 |
| 51 | -1712 |
| 52 | 5524 |
| 53 | 2726 |
| 54 | -6316 |
| 55 | -2737 |
| 56 | 8652 |
| 57 | 4233 |
| 58 | -9907 |